Elementary School Science Quiz: Water As Solid And Liquid
20 questions · exam conditions
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Water As Solid And LiquidQuestion 1 of 20

Amir watched the weather. Solid (ice): hail on the ground, ice on a pond, frost on grass. Liquid (water): rain falling, puddles forming, water in a bottle. Which is an example of water as a solid (ice)?

Rain and puddles
Water in a bottle and rain
Hail and pond ice
Cold bottle and hard cap
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Elementary School Science Quiz

Elementary School Science Quiz: Water As Solid And Liquid

Practice Water As Solid And Liquid in Elementary School Science with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Water As Solid And Liquid, giving you a quick way to practice the rules, question types, and explanations that matter most for Elementary School Science.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Amir watched the weather. Solid (ice): hail on the ground, ice on a pond, frost on grass. Liquid (water): rain falling, puddles forming, water in a bottle. Which is an example of water as a solid (ice)?

  1. Rain and puddles
  2. Water in a bottle and rain
  3. Hail and pond ice (correct answer)
  4. Cold bottle and hard cap
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include hail on the ground, ice on a pond, and frost on grass which are solid water, and rain falling, puddles forming, and water in a bottle which are liquid water. Choice C is correct because hail and pond ice are frozen water, making them solid, not liquid. Choice D represents confusing container properties with water state, which happens when students think cold or hard objects like bottles and caps mean the water is solid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 2

Look at the observations from Jamal. Solid (ice): snow on the yard, a frozen puddle, ice cubes in the freezer. Liquid (water): water in a glass, water from the faucet, puddles after rain. Which shows liquid water?

  1. Snow and ice cubes
  2. Frozen puddle and snow
  3. Water in a glass and faucet water (correct answer)
  4. Ice cubes and frost
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include snow on the yard, a frozen puddle, and ice cubes in the freezer which are solid water, and water in a glass, water from the faucet, and puddles after rain which are liquid water. Choice C is correct because water in a glass and faucet water are water in liquid form that flows and can be poured. Choice A represents a reversal of classification, which happens when students mix up solid and liquid by choosing hard, shape-holding examples instead of flowing ones. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 3

Chen wrote notes at home. Solid (ice): ice cubes in lemonade, frost on the mailbox, a frozen puddle. Liquid (water): water from the hose, water in the sink, a puddle after rain. What did Chen observe that was liquid water?

  1. Ice cubes and frost
  2. Frozen puddle and frost
  3. Hose water and sink water (correct answer)
  4. Icicles and snow
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include ice cubes in lemonade, frost on the mailbox, and a frozen puddle which are solid water, and water from the hose, water in the sink, and a puddle after rain which are liquid water. Choice C is correct because hose water and sink water are water in liquid form that flows and can be poured. Choice A represents a reversal of classification, which happens when students reverse solid and liquid by selecting frozen examples instead of flowing ones. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 4

Carlos made observations. Solid (ice): ice on a pond, ice cubes in a tray, frost on a car. Liquid (water): a puddle in the driveway, water in a cup, water from the hose. Which examples show water as a liquid?

  1. Ice on a pond and frost
  2. Puddle and cup water (correct answer)
  3. Ice cubes and pond ice
  4. Hard tray and hard cup
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include ice on a pond, ice cubes in a tray, and frost on a car which are solid water, and a puddle in the driveway, water in a cup, and water from the hose which are liquid water. Choice B is correct because puddle and cup water are water in liquid form that flows and can be poured. Choice D represents confusing container properties with water state, which happens when students think hard objects like trays or cups mean the water is solid, ignoring the actual state. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 5

Read about what Sofia saw outside. Solid (ice): frost on a window, icicles on a tree, snow on the steps. Liquid (water): rain falling, puddles on the road, water in a cup. Which examples show water in solid form (ice)?

  1. Frost and icicles (correct answer)
  2. Rain and puddles
  3. Water in a cup and rain
  4. Cold cup and hard glass
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include frost on a window, icicles on a tree, and snow on the steps which are solid water, and rain falling, puddles on the road, and water in a cup which are liquid water. Choice A is correct because frost and icicles are frozen water, making them solid, not liquid. Choice D represents confusing container properties with water state, which happens when students think the hardness of objects like cups or glass determines if the water inside is solid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 6

Read Marcus's weather notes. Which is an example of water as a solid (ice)? Marcus saw snow falling. He saw rain later. He saw water in a sink. He saw a puddle on the road.

  1. Rain and puddle
  2. Snow and rain
  3. Snow (correct answer)
  4. Sink water
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, the examples include snow which is solid water, and rain, sink water, and a puddle which are liquid water. Choice C is correct because snow is frozen water in solid form—it consists of ice crystals that fall from the sky and accumulate on the ground. Choice B represents a category mixing error, which happens when students include both solid (snow) and liquid (rain) forms together instead of identifying only the solid form. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that snow is a form of solid water just like ice cubes.

Question 7

Keisha looked outside on a cold morning. Solid (ice): frost on grass, icicles on a gutter, and ice cubes in a cooler. Liquid (water): rain later, puddles on the street, and water in the sink. Which is frozen water (solid ice)?

  1. Rain and sink water
  2. Puddles and rain
  3. Frost and icicles (correct answer)
  4. Cold sink and hard faucet
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include frost on grass, icicles on a gutter, and ice cubes in a cooler which are solid water, and rain later, puddles on the street, and water in the sink which are liquid water. Choice C is correct because frost and icicles are frozen water, making them solid, not liquid. Choice D represents confusing container properties with water state, which happens when students mistake hard or cold objects like sinks and faucets for solid water forms. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 8

Marcus wrote a science log. Solid (ice): ice cubes were hard and cold, and frost was sparkly. Liquid (water): the melted ice made a small puddle, and sink water poured easily. Based on the observations, which are liquids?

  1. Ice cubes and frost
  2. Melted ice and sink water (correct answer)
  3. Frost and ice cubes
  4. Cold air and cold metal
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include ice cubes that were hard and cold, and frost that was sparkly which are solid water, and melted ice that made a small puddle, and sink water that poured easily which are liquid water. Choice B is correct because melted ice and sink water are water in liquid form that flows and can be poured. Choice D represents confusing cold temperature with solid state, which happens when students think anything cold like air or metal is solid water without checking if it's actually frozen water. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 9

Read about what Emma saw. Solid (ice): ice cubes in a cup, frost on grass, icicles on a roof. Liquid (water): rain on her jacket, a puddle on the sidewalk, water in the sink. Which is frozen water (solid ice)?

  1. Rain and a puddle
  2. Ice cubes and icicles (correct answer)
  3. Cold water in a cup
  4. A rock and a leaf
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include ice cubes in a cup, frost on grass, and icicles on a roof which are solid water, and rain on her jacket, a puddle on the sidewalk, and water in the sink which are liquid water. Choice B is correct because ice cubes and icicles are frozen water, making them solid, not liquid. Choice A represents a reversal of classification, which happens when students confuse solid and liquid states by selecting examples that flow and pour instead of those that are hard and hold shape. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 10

Read about what Emma saw. Solid (ice): ice cubes, frost, icicles. Liquid (water): rain, puddles, sink water. Which are solid water (ice)?

  1. Rain and puddles
  2. Ice cubes and frost (correct answer)
  3. Sink water and rain
  4. Cold water and a bottle
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Emma observed ice cubes, frost, and icicles as solid water, and rain, puddles, and sink water as liquid water. Choice B is correct because ice cubes and frost are both frozen water, making them solid forms of water that are hard and hold their shape. Choice A represents a common error where students confuse liquid water examples, which happens when students don't understand that rain and puddles flow and pour, making them liquid not solid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container.

Question 11

Read Chen's observations. What is an example of water as a liquid? Chen saw ice cubes on a plate. He saw snow on the ground. He saw a puddle by the curb. He saw water from the faucet.

  1. Ice cubes and snow
  2. Puddle and faucet water (correct answer)
  3. Snow and puddle
  4. Ice cubes and faucet water
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, the examples include ice cubes and snow which are solid water, and a puddle and faucet water which are liquid water. Choice B is correct because both a puddle and water from the faucet are water in liquid form that flows, can be poured, and takes the shape of its container. Choice C represents a category mixing error, which happens when students combine solid (snow) and liquid (puddle) forms instead of identifying only liquids. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Practice with real examples: ice cubes (solid) and water in cup (liquid).

Question 12

Read Keisha's observations. Which shows liquid water? Keisha saw icicles by the gutter. She saw snow on the steps. She saw water in a cup. She saw a puddle after rain.

  1. Icicles and snow
  2. Water in a cup and puddle (correct answer)
  3. Snow and puddle
  4. Icicles and water in a cup
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, the examples include icicles and snow which are solid water, and water in a cup and a puddle which are liquid water. Choice B is correct because both water in a cup and a puddle after rain are water in liquid form that flows and takes the shape of its container or ground surface. Choice A represents selecting only solids error, which happens when students identify the frozen forms (icicles and snow) instead of the liquids as requested. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Show that both are water, just in different forms based on temperature.

Question 13

Read what Sofia saw. Solid ice: ice cubes and icicles. Liquid water: rain and a puddle. Which is an example of water as a solid (ice)?

  1. Rain and a puddle
  2. Ice cubes and icicles (correct answer)
  3. Cold water and rain
  4. A bottle and rain
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Sofia observed ice cubes and icicles as solid ice, and rain and a puddle as liquid water. Choice B is correct because ice cubes and icicles are both frozen water, making them solid forms of water that are hard and hold their shape. Choice A represents a common error where students confuse examples, which happens when students don't carefully distinguish between the solid and liquid categories shown in the observation. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container.

Question 14

Read about what Chen saw. Solid (ice): snow, frost, frozen puddle. Liquid (water): river water, rain, puddles. Which is an example of water as a solid?

  1. River water and rain
  2. Puddles and river water
  3. Snow and frost (correct answer)
  4. Water and water
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Chen observed snow, frost, and frozen puddle as solid water, and river water, rain, and puddles as liquid water. Choice C is correct because snow and frost are both frozen forms of water, making them solid—they are hard and hold their shape rather than flowing. Choice A represents a category confusion where students select liquid examples when asked for solid, which happens when students don't understand that river water and rain flow and pour, making them liquid not solid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 15

Carlos wrote a science log. Solid (ice): ice on a pond, snow, ice cubes. Liquid (water): lake water, rain, water in a cup. Which is solid water (ice)?

  1. Lake water and rain
  2. Water in a cup and rain
  3. Ice on a pond and snow (correct answer)
  4. Cold juice and a bottle
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Carlos recorded ice on a pond, snow, and ice cubes as solid water, and lake water, rain, and water in a cup as liquid water. Choice C is correct because ice on a pond and snow are both frozen water, making them solid forms that are hard and maintain their shape. Choice B represents a classification error where students select liquid water when asked for solid, which happens when students don't understand that water in a cup and rain flow and pour, making them liquid not solid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Practice with real examples: ice cubes (solid) and water in cup (liquid).

Question 16

Read Yuki's experiment. She froze water into ice cubes. She also saw rain and a puddle outside. Which is an example of water as a liquid?

  1. Ice cubes and rain
  2. Rain and a puddle (correct answer)
  3. Ice cubes and frost
  4. Cold metal and ice
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Yuki made ice cubes (solid water) and observed rain and a puddle (liquid water) outside. Choice B is correct because rain and a puddle are both liquid water—rain is water falling from clouds and puddles are water collected on the ground, both able to flow. Choice C represents selecting solid examples when asked for liquid, which happens when students don't carefully read what the question is asking for. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Practice identifying examples: have students point out liquid water around them (sink, drinking fountain, rain). Always emphasize reading the question to know whether it asks for solid or liquid examples.

Question 17

Read about Chen's weather notes. Solid ice: snow and icicles. Liquid water: rain and water from a hose. Which examples show water in solid form (ice)?

  1. Snow and icicles (correct answer)
  2. Rain and hose water
  3. Snow and rain
  4. Cold juice and rain
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Chen noted snow and icicles as solid ice, and rain and water from a hose as liquid water. Choice A is correct because snow and icicles are both frozen water in solid form—snow is frozen water crystals and icicles are frozen water that was dripping. Choice C represents a mixing error, which happens when students combine one solid example (snow) with one liquid example (rain) instead of grouping by state. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Show that both are water, just in different forms based on temperature. Watch for students who mix categories by not paying attention to whether water is frozen or flowing.

Question 18

Read Carlos's notes. Which examples show water in solid form (ice)? Carlos saw ice cubes in a tray. He saw a frozen puddle outside. He saw water in a bottle. He saw rain falling.

  1. Ice cubes and frozen puddle (correct answer)
  2. Water in a bottle and rain
  3. Frozen puddle and rain
  4. Bottle and ice cubes
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, the examples include ice cubes and a frozen puddle which are solid water, and water in a bottle and rain which are liquid water. Choice A is correct because both ice cubes in a tray and a frozen puddle are water in solid form—they are hard, cold, and maintain their shape. Choice D represents a container confusion error, which happens when students focus on the container (bottle) rather than the state of water inside it, or mix categories by including both solid (ice cubes) and liquid forms. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Watch for students who confuse the hardness of a container with the state of the water inside.

Question 19

Read about what Yuki saw. Which is an example of water as a solid? Yuki saw frost, rain, and a puddle.

  1. Rain
  2. Puddle
  3. Frost (correct answer)
  4. Cold air
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). The same substance, water, can be solid (frozen) or liquid depending on temperature. In this scenario, the examples include frost which is solid water, and rain and a puddle which are liquid water. Choice C is correct because frost is frozen water vapor that forms as ice crystals on surfaces, making it solid water. Choice A represents a common error where students think all wet things must be liquid, which happens when students focus on moisture rather than the actual state of matter. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Create a chart with two columns (Solid Water/Ice and Liquid Water) and have students brainstorm examples for each. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Show that both are water, just in different forms based on temperature. Practice with real examples: ice cubes (solid) and water in cup (liquid). Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.

Question 20

Marcus made ice cubes in a freezer. Later, the ice melted into water in a bowl. Which is an example of water as a liquid?

  1. Ice cubes and frost
  2. Melted ice and bowl water (correct answer)
  3. Icicles and snow
  4. Rock and cold air
Explanation: This question tests 2nd grade understanding that water can be solid or liquid (NGSS 2-ESS2-3: Obtain information to identify where water is found on Earth and that it can be solid or liquid). Water can exist in different forms. When water is very cold (at or below freezing temperature, 32°F or 0°C), it becomes solid—we call this ice. Solid water is hard and holds its shape (ice cubes, snow, icicles, frost, frozen puddles, hail). When water is warmer than freezing, it is liquid—it flows and pours and takes the shape of its container (water in cups, rain, puddles, rivers, water from faucet). In this scenario, Marcus observed ice cubes melting into water in a bowl, showing the transformation from solid to liquid water. Choice B is correct because melted ice and bowl water are both liquid forms of water that flow and take the shape of their container (the bowl). Choice A represents a state confusion where students select the solid form when asked for liquid, which happens when students don't understand that ice cubes and frost are frozen and hard, making them solid not liquid. To help students identify solid and liquid water: Do a freezing/melting experiment—freeze water in ice cube tray, then let ice melt and observe the change from solid to liquid. Emphasize key properties: solid water (ice) is hard and holds its shape; liquid water flows and takes shape of container. Watch for students who think cold water is solid just because it's cold, or who confuse the hardness of a container with the state of the water inside.