Elementary School Science Quiz: Plants Store Sunlight Energy
20 questions · exam conditions
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Plants Store Sunlight EnergyQuestion 1 of 20

According to the explanation, plants change sunlight into stored energy by making what?

sugar first, then sometimes starch for long‑term storage
chlorophyll, which stores the sun's energy permanently
water, which holds sunlight energy inside the plant
heat, which stays inside the plant as stored energy
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Elementary School Science Quiz

Elementary School Science Quiz: Plants Store Sunlight Energy

Practice Plants Store Sunlight Energy 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 Plants Store Sunlight Energy, 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

According to the explanation, plants change sunlight into stored energy by making what?

  1. sugar first, then sometimes starch for long‑term storage (correct answer)
  2. chlorophyll, which stores the sun's energy permanently
  3. water, which holds sunlight energy inside the plant
  4. heat, which stays inside the plant as stored energy
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored; during photosynthesis, plants use light energy to make sugar (a type of food), and the sugar molecules store the energy in their chemical bonds—this is called chemical energy, with some sugar used right away for growth and much stored as starch for later use in various plant parts like leaves, roots, stems, fruits, and seeds. Choice A is correct because it accurately describes that plants change sunlight into stored energy by making sugar first, then sometimes starch for long-term storage, demonstrating understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice B fails because it suggests chlorophyll stores energy, when chlorophyll captures light but the energy is stored in sugar molecules; energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in chlorophyll. To help students understand energy storage in plants, use food examples they eat like potatoes (stores energy in underground stems), carrots (in roots), apples (in fruits), corn (in seeds), and lettuce (in leaves), and ask 'Where did the energy in this carrot come from?' while tracing backwards from the sun; demonstrate with an energy flow diagram showing Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores chemical energy → Stored in plant parts, emphasizing energy changes from light to chemical and is stored in food molecules, not in water, chlorophyll, light, or heat.

Question 2

According to the explanation, how is sunlight energy stored as sugar or starch in plants?​​

  1. as heat trapped inside the leaves and stems
  2. as chemical energy in sugar and starch plant food (correct answer)
  3. as light saved inside the leaves all day
  4. as electrical energy moving through plant cells
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light or heat—they transform it into chemical energy. During photosynthesis, plants use light energy to make sugar, and the sugar molecules store the energy in their chemical bonds. This sugar can then be converted to starch for long-term storage. Choice B is correct because it accurately describes that plants store sunlight energy as chemical energy in sugar and starch plant food, demonstrating understanding that energy changes form from light to chemical. Choice A fails because heat is not how plants store energy—while some heat is produced, the energy is stored in chemical bonds. Choice C fails because light cannot be saved or stored inside leaves—light energy must be converted to be stored. Choice D fails because plants don't use electrical energy for storage. To help students: Use a flashlight and battery analogy—you can't store light from a flashlight, but a battery stores chemical energy that can make light later. Similarly, plants can't store sunlight directly but convert it to chemical energy in food.

Question 3

The energy from sunlight is stored in plants as what kind of energy in food?​

  1. chemical energy in sugar and starch (correct answer)
  2. electrical energy in plant cells
  3. light energy trapped in chlorophyll
  4. heat energy held in the leaves
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as chemical energy in sugar and starch. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice C fails because it suggests chlorophyll stores energy, when chlorophyll captures light but the energy is stored in sugar molecules. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Watch for: Students who think energy stays as light, or who confuse materials (water, chlorophyll) with stored energy. Reinforce: 'Light energy IN → chemical energy stored in food OUT.'

Question 4

Plants convert light energy from the sun into energy stored as what?​​​

  1. chemical energy in sugar, sometimes changed into starch (correct answer)
  2. heat energy kept warm inside the plant
  3. light energy saved in leaves like a flashlight
  4. oxygen gas stored in plant parts as fuel
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. During photosynthesis, plants capture light energy from the sun and use it to make sugar molecules. The light energy doesn't stay as light—it's converted into chemical energy stored in the bonds of sugar molecules. Plants often convert some of this sugar into starch (many sugar molecules connected together) for more efficient long-term storage. The key transformation: light energy from the sun becomes chemical energy in sugar, which can be changed into starch. Choice A is correct because it accurately describes that plants convert light energy into chemical energy in sugar, sometimes changed into starch. This demonstrates understanding of the energy transformation from light to chemical form and that both sugar and starch are storage molecules. Choice B fails because it claims energy is stored as heat kept warm, when the stored form is chemical energy in food molecules. Choice C fails because it states light energy is saved like a flashlight, when light must be converted to chemical energy to be stored. Choice D fails because it suggests oxygen gas is stored as fuel, when oxygen is a byproduct and energy is stored in sugar/starch. To help students understand: Draw the energy conversion—Sun (light) → Leaf (captures light) → Sugar (chemical energy) → Starch (chemical energy for long-term storage). Ask: 'Why do we eat food for energy? Because food like sugar and starch contains chemical energy!' Emphasize the transformation: 'Plants are energy converters—they change light energy into chemical energy we can eat.'

Question 5

How is light energy stored in plant food after photosynthesis makes sugar?​

  1. as chemical energy in sugar, sometimes changed to starch (correct answer)
  2. as heat energy held in leaves during the day
  3. as light energy trapped under the leaf surface
  4. as electrical energy moving through plant tubes
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. After photosynthesis produces sugar, the light energy has been transformed into chemical energy stored in the sugar's molecular bonds. Plants can use this sugar immediately or convert it to starch (many sugar molecules linked together) for more efficient long-term storage. Choice A is correct because it accurately describes that light energy is stored as chemical energy in sugar, sometimes changed to starch, showing understanding of both the energy form and storage molecules. Choices B, C, and D fail because they suggest energy remains as heat, light, or electricity—but the key concept is that light energy is transformed into chemical energy in food molecules, which is the only form that can be stored and used later by living things.

Question 6

How do plants store the energy they capture from sunlight during photosynthesis?​

  1. by turning light into sugar and starch for storage (correct answer)
  2. by keeping the light energy shining in leaves
  3. by storing the energy as heat in plant cells
  4. by holding the energy in water inside the plant
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. During photosynthesis, plants capture light energy and use it to make sugar molecules from carbon dioxide and water. The key transformation is that light energy becomes chemical energy stored in the bonds of sugar and starch molecules—this stored chemical energy can be used later by the plant or by organisms that eat the plant. Choice A is correct because it accurately describes that plants turn light into sugar and starch for storage, showing understanding of the energy transformation from light to chemical energy in food molecules. Choice B fails because light energy cannot be kept shining or stored as light—it must be converted; Choices C and D fail because energy is stored as chemical energy in food molecules, not as heat or in water.

Question 7

According to the explanation, what form does sun energy take when stored in plants?

  1. as chemical energy in sugar and starch made during photosynthesis (correct answer)
  2. as light energy trapped inside the leaves all day
  3. as heat energy kept warm inside stems and roots
  4. as electrical energy moving through the plant's cells
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as chemical energy in sugar and starch made during photosynthesis. This demonstrates understanding that energy is stored in a usable form (food molecules) in the plant, and that the stored form is chemical energy, not light or heat. Choice B fails because it claims energy is stored as light, when light energy is converted to chemical energy in food. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not as light, heat, or electricity. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit). Ask: 'Where did the energy in this carrot come from?' Trace backwards: 'Energy in carrot ← made by carrot plant ← using sunlight ← sunlight came from sun. So the energy you get from eating a carrot originally came from the sun!'

Question 8

According to the explanation, plants store energy by moving sugar to parts and making what?​

  1. starch for long‑term storage in plant parts (correct answer)
  2. heat stored in leaves for cold nights
  3. light stored in the green color of leaves
  4. electricity stored in stems and roots
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as starch for long-term storage in plant parts. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice C fails because it claims energy is stored as light, when light energy is converted to chemical energy in food. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Demonstrate the transformation: draw an energy flow diagram with Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores energy as chemical energy → Stored in plant parts. The food IS the stored energy.

Question 9

The model shows plants store energy by moving sugar to which plant parts?

  1. to leaves, roots, stems, fruits, and seeds (correct answer)
  2. to the soil so it can hold the energy
  3. to chlorophyll where the energy stays forever
  4. to leaf air pockets where light is stored
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. The model shows that after plants make sugar through photosynthesis, they transport it through their vascular system to various parts for storage: leaves store sugar for immediate use, roots store it as starch (like in carrots), stems can store it (like in potatoes), fruits store it to attract animals for seed dispersal, and seeds store it to fuel germination. Choice A is correct because it identifies all major plant parts where sugar can be transported and stored, demonstrating understanding of energy distribution throughout the plant. Choices B, C, and D fail because soil doesn't store plant energy; chlorophyll captures but doesn't store energy; and air pockets don't store light—only sugar and starch molecules in plant tissues store energy.

Question 10

Plants convert light energy from the sun into stored energy by making what?

  1. chlorophyll, which holds energy like a battery
  2. sugar first, and then sometimes starch for long‑term storage (correct answer)
  3. water, which stores the sun's energy inside cells
  4. electricity that travels through plant tubes
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Different plants store this energy-rich food in different places: lettuce stores it in leaves, carrots store it in roots, potatoes store it in underground stems, apples store it in fruits, and corn stores it in seeds. The key point: the energy that was originally light from the sun is now stored as chemical energy in plant food (sugar and starch). Choice B is correct because it accurately describes that plants store energy as sugar first, and then sometimes starch for long-term storage. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice A fails because it suggests chlorophyll stores energy, when chlorophyll captures light but the energy is stored in sugar molecules. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Ask: 'Where did the energy in this carrot come from?' Trace backwards: 'Energy in carrot ← made by carrot plant ← using sunlight ← sunlight came from sun. So the energy you get from eating a carrot originally came from the sun!' Demonstrate the transformation: draw an energy flow diagram with Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores energy as chemical energy → Stored in plant parts. Emphasize two key points: (1) Energy changes form from light to chemical, and (2) Energy is stored IN the food (sugar/starch), not in water, chlorophyll, or other plant parts. The food IS the stored energy. Watch for: Students who think energy stays as light, or who confuse materials (water, chlorophyll) with stored energy. Reinforce: 'Light energy IN → chemical energy stored in food OUT.'

Question 11

How do plants store the energy they capture from sunlight during photosynthesis?

  1. by turning it into sugar and starch stored in plant parts (correct answer)
  2. by keeping it as light inside leaves until night ends
  3. by storing it as oxygen gas inside stems and roots
  4. by putting it into soil around roots for later use
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored; during photosynthesis, plants use light energy to make sugar (a type of food), and the sugar molecules store the energy in their chemical bonds—this is called chemical energy, with some sugar used right away for growth and much stored as starch for later use in various plant parts like leaves, roots, stems, fruits, and seeds. Choice A is correct because it accurately describes that plants store energy by turning it into sugar and starch stored in plant parts, demonstrating understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice B fails because it claims energy is stored by keeping it as light inside leaves until night ends, when light energy is converted to chemical energy in food; energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not as light. To help students understand energy storage in plants, use food examples they eat like potatoes (stores energy in underground stems), carrots (in roots), apples (in fruits), corn (in seeds), and lettuce (in leaves), and ask 'Where did the energy in this carrot come from?' while tracing backwards from the sun; demonstrate with an energy flow diagram showing Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores chemical energy → Stored in plant parts, emphasizing energy changes from light to chemical and is stored in food molecules, not in water, chlorophyll, light, or heat.

Question 12

The energy from sunlight is stored in plants as what kind of energy in food?

  1. chemical energy in sugar and starch (correct answer)
  2. electrical energy in plant cells
  3. light energy trapped in chlorophyll
  4. heat energy held in the leaves
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as chemical energy in sugar and starch. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice C fails because it suggests chlorophyll stores energy, when chlorophyll captures light but the energy is stored in sugar molecules. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Watch for: Students who think energy stays as light, or who confuse materials (water, chlorophyll) with stored energy. Reinforce: 'Light energy IN → chemical energy stored in food OUT.'

Question 13

According to the explanation, how is sunlight energy stored as sugar or starch in plants?

  1. as heat trapped inside the plant
  2. as chemical energy in sugar and starch (correct answer)
  3. as light energy held in the leaves
  4. as energy stored in the water inside
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice B is correct because it accurately describes that plants store energy as chemical energy in sugar and starch. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice A fails because it claims energy is stored as heat, when the stored form is chemical energy in food molecules. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Ask: 'Where did the energy in this carrot come from?' Trace backwards: 'Energy in carrot ← made by carrot plant ← using sunlight ← sunlight came from sun. So the energy you get from eating a carrot originally came from the sun!'

Question 14

According to the model, what form does the sun's energy take in plants?​​​

  1. chemical energy stored in sugar and starch food (correct answer)
  2. light energy stored unchanged inside the leaves
  3. heat energy stored in stems and roots
  4. electrical energy stored in plant veins
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't keep it as light—they transform it into a different form that can be stored. During photosynthesis, plants use light energy to make sugar molecules. The energy from sunlight is now stored in the chemical bonds of the sugar—this is called chemical energy. Plants also convert some sugar into starch for long-term storage. The key point: the sun's energy changes form from light to chemical energy stored in food molecules. Choice A is correct because it accurately identifies that the sun's energy takes the form of chemical energy stored in sugar and starch food. This demonstrates understanding of energy transformation—light energy becomes chemical energy in food molecules. Choice B fails because it claims light energy is stored unchanged, when light must be converted to be stored. Choice C fails because it states energy becomes heat in stems and roots, when the stored form is chemical energy in food. Choice D fails because it suggests electrical energy in plant veins, which is not how plants store energy. To help students understand: Draw an energy transformation diagram with arrows: Sun (light energy) → Plant leaf (captures light) → Sugar molecule (chemical energy). Ask: 'Can you store sunlight in a jar? No! But plants change light into sugar, which CAN be stored.' Use concrete examples: 'The energy in a potato came from the sun, but it's not stored as light—it's stored as starch (chemical energy).'

Question 15

According to the explanation, plants store energy by moving sugar to parts and making what?

  1. starch for long‑term storage in plant parts (correct answer)
  2. heat stored in leaves for cold nights
  3. light stored in the green color of leaves
  4. electricity stored in stems and roots
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as starch for long-term storage in plant parts. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice C fails because it claims energy is stored as light, when light energy is converted to chemical energy in food. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Demonstrate the transformation: draw an energy flow diagram with Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores energy as chemical energy → Stored in plant parts. The food IS the stored energy.

Question 16

The explanation says plants convert light energy into what kind of stored energy?

  1. chemical energy stored in food like sugar and starch (correct answer)
  2. sound energy stored in the leaves when wind blows
  3. light energy stored unchanged inside chlorophyll
  4. heat energy stored in the plant after sunlight hits it
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. The key concept is energy transformation: plants don't store light energy as light—they convert it to a different form. During photosynthesis, light energy powers the making of sugar molecules. The energy becomes stored in the chemical bonds of these sugar molecules—this is called chemical energy. This chemical energy in food (sugar and starch) is what plants and animals can use later for growth and activities. Choice A is correct because it accurately describes that plants convert light energy into chemical energy stored in food like sugar and starch. This demonstrates understanding of the energy transformation from light to chemical energy. Choice C fails because it claims light energy is stored unchanged inside chlorophyll, when chlorophyll captures light but the energy is stored in sugar molecules. Light energy must be converted to be stored—it becomes chemical energy in food molecules. To help students understand energy transformation: Use an analogy—'A solar panel converts light to electricity; a plant converts light to chemical energy in food.' Draw arrows showing: Sunlight (light energy) → Chlorophyll captures → Energy powers sugar-making → Sugar stores chemical energy. Emphasize: Energy changes form but is not lost—it goes from light energy to chemical energy in food.

Question 17

What form does the sun's energy take when stored in a plant's food?​

  1. chemical energy stored in sugar and starch (correct answer)
  2. light energy stored in the leaf surface
  3. heat energy stored in the plant's water
  4. electrical energy stored in plant veins
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as chemical energy stored in sugar and starch. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice B fails because it claims energy is stored as light, when light energy is converted to chemical energy in food. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Demonstrate the transformation: draw an energy flow diagram with Sun (light energy) → Plant captures light → Plant makes sugar → Sugar stores energy as chemical energy → Stored in plant parts.

Question 18

The explanation says sugar stores energy in its chemical bonds; this energy came from what?

  1. sunlight captured by green leaves during photosynthesis (correct answer)
  2. soil nutrients turned directly into energy by roots
  3. water stored in stems changing into energy later
  4. plant color making energy without any sunlight
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. The question traces energy backwards from its stored form (sugar) to its original source. Sugar molecules store energy in their chemical bonds, and this energy originally came from sunlight that was captured by chlorophyll in green leaves during photosynthesis. The plant used the light energy to power the chemical reactions that built sugar molecules from simpler materials. Choice A is correct because it accurately identifies sunlight captured by green leaves during photosynthesis as the original source of energy stored in sugar's chemical bonds. Choice B fails because soil nutrients provide materials (like nitrogen and minerals) but not energy—energy comes from sunlight. Choice C fails because water is a raw material used to make sugar but doesn't provide the energy. Choice D fails because plant color (chlorophyll) captures energy but needs sunlight—it can't make energy without light. Teaching strategy: Draw an energy flow diagram: Sun → Light energy → Captured by chlorophyll → Powers sugar-making → Energy stored in sugar bonds. Ask students to trace where the energy in an apple originally came from, working backwards to the sun.

Question 19

Plants convert light energy from the sun into what stored form during photosynthesis?

  1. chemical energy stored as sugar and starch (correct answer)
  2. light energy stored in leaf air pockets
  3. energy stored as oxygen in the air
  4. energy stored as heat in the stem
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. When plants capture light energy from the sun, they don't store it as light—they transform it into a different form of energy that can be stored. During photosynthesis, plants use light energy to make sugar (a type of food). The sugar molecules store the energy in their chemical bonds—this is called chemical energy. Some sugar is used right away by the plant for growth, but much of it is stored for later use, either as sugar or as starch (starch is made from many sugar molecules connected together, and is good for long-term storage). Choice A is correct because it accurately describes that plants store energy as chemical energy stored as sugar and starch. This demonstrates understanding that energy is stored in a usable form (food molecules) in various parts of the plant, and that the stored form is chemical energy, not light or heat. Choice C fails because it states energy is stored as oxygen in the air, when oxygen is a byproduct of photosynthesis but doesn't store energy. Energy must be stored in a stable form that can be used later—sugar and starch molecules store energy in chemical bonds, not in water, chlorophyll, light, or heat. To help students understand energy storage in plants: Use food examples they eat—potato (stores energy in underground stem), carrot (stores in root), apple (stores in fruit), corn (stores in seeds), lettuce (stores in leaves). Emphasize two key points: (1) Energy changes form from light to chemical, and (2) Energy is stored IN the food (sugar/starch), not in water, chlorophyll, or other plant parts.

Question 20

According to the model, why do plants change some sugar into starch?

  1. to store energy for a longer time in plant parts (correct answer)
  2. to store sunlight as light inside the leaves
  3. to store energy as electricity in the stem
  4. to store energy as heat in the air around leaves
Explanation: This question tests the ability to use models to explain how plants store energy from sunlight in food (NGSS 5-PS3-1). Students must understand that light energy is converted to chemical energy stored in plant food. Plants make sugar during photosynthesis, but sugar molecules can be linked together to form starch. Starch is better for long-term storage because it's more compact and stable than sugar. Think of it like this: sugar is like having loose coins (good for immediate use), while starch is like rolling coins into tubes (better for storage). Plants store starch in roots (like potatoes), seeds (like corn), and other parts where energy needs to be saved for later use. Choice A is correct because it accurately describes that plants change sugar to starch to store energy for a longer time in plant parts. This demonstrates understanding that starch is a storage form of the chemical energy originally captured from sunlight. Choice B fails because it suggests storing sunlight as light inside leaves, when light energy must be converted to chemical energy in food molecules to be stored. Energy cannot be stored as light, electricity, or heat—it must be in the stable form of chemical bonds in food molecules. To help students understand: Compare sugar and starch to money—sugar is like cash (ready to use), starch is like a savings account (stored for later). Show how both sugar and starch store chemical energy from the sun, just in different forms for different purposes.