This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). A ratio expresses the relationship between two quantities, and with salt water at 97% and fresh water at 3%, the salt-to-fresh water ratio is 97:3. This mathematical representation helps students understand proportional relationships in Earth's water distribution. Choice C is correct because it accurately shows the salt-to-fresh water ratio as 97:3, demonstrating that students can convert percentage data into ratio format with salt water listed first as requested in the question. Choice A is incorrect because it reverses the ratio to 3:97, which would mean fresh-to-salt water instead of salt-to-fresh water as asked. This misconception occurs when students correctly identify the numbers but don't pay attention to the order requested in the question, or when they habitually list the smaller number first. To help students: Explicitly teach ratio notation and that order matters - 'salt-to-fresh' means salt number comes first. Use arrows: salt water (97) → fresh water (3) gives us 97:3. Practice with familiar ratios like boys-to-girls in class, always emphasizing which comes first. Create ratio cards where students match percentages to correct ratios. Watch for: students who reverse the order, who don't understand colon notation, who simplify inappropriately (like reducing 97:3 to 32:1 when not asked to), or who confuse ratios with fractions.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Ocean water is salt water, making up about 97% of Earth's total water, while fresh water (rivers, lakes, ice caps, groundwater) comprises only about 3%. This reflects the dominance of Earth's oceans in the global water distribution. Choice B is correct because it accurately identifies that ocean water (salt water) is 97% and fresh water is 3%, demonstrating that students understand ocean water is salt water and can correctly read percentage data from tables. Choice A is incorrect because it reverses the percentages, claiming ocean water is only 3% and fresh water is 97%. This misconception occurs when students don't understand that oceans contain salt water, when they misread data tables, or when they think fresh water must be more abundant because they interact with it daily. To help students: Explicitly teach that ocean water = salt water before working with data. Use maps showing how much of Earth's surface is covered by oceans. Have students taste salt water (safely prepared) to make the connection concrete. Create vocabulary cards linking 'ocean,' 'sea,' and 'salt water.' Watch for: students who don't know oceans are salt water, who think some oceans might be fresh water, who confuse 'ocean water' with all water on Earth, or who reverse percentages when reading tables.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water is divided very unevenly: about 97% is salt water (in oceans) and only about 3% is fresh water. This means salt water is approximately 32 times more abundant than fresh water. Of the 3% that is fresh water, most (about 2% of total Earth's water) is frozen in ice caps and glaciers, and about 0.6% is groundwater. Rivers, lakes, and other accessible fresh water sources represent only about 0.01% of Earth's total water. This distribution explains why fresh water is considered precious and why water conservation is important - even though Earth is covered mostly by water, very little of it is fresh water that humans can easily use. Choice A is correct because it accurately reflects the data showing salt water is much more than fresh water, at 97% to 3%. This demonstrates understanding that students can read data (percentages, graphs, or tables) and draw accurate conclusions about the dramatic difference in amounts between salt water and fresh water on Earth. Choice B is incorrect because it reverses the amounts, claiming fresh water is much more than salt water. This misconception commonly occurs when students see Earth has lots of water and assume it's mostly fresh and usable, when they misread graphs or percentages, or when they don't grasp the magnitude of the difference (97% to 3% means salt water is 32 times more abundant, not just 'a little more'). Some students may also confuse what they observe locally (rivers, lakes) with the global distribution. To help students: Create visual representations that make the difference dramatic - 97 blue blocks (salt water) and 3 green blocks (fresh water) out of 100 total. Use concrete comparison: If we had 100 cups of water, 97 would be salt water from oceans, only 3 would be fresh water. Create a large pie chart on floor with tape where students can physically see how small the fresh water section is. Practice reading percentages and comparing: Which is more, 97% or 3%? How much more? Connect to real-world: Why do we need to conserve water if Earth is mostly water? Because most is salt water we can't drink. Watch for: students who think 'water is water' without distinguishing salt vs. fresh, who don't understand percentages well enough to compare 97% vs. 3%, who misread graphs (confusing which section is which), or who know salt water is more but don't grasp how dramatically more.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water is divided very unevenly: about $97%$ is salt water (in oceans) and only about $3%$ is fresh water. This means salt water is approximately $32$ times more abundant than fresh water. Of the $3%$ that is fresh water, most (about $2%$ of total Earth's water) is frozen in ice caps and glaciers, and about $0.6%$ is groundwater. Rivers, lakes, and other accessible fresh water sources represent only about $0.01%$ of Earth's total water. This distribution explains why fresh water is considered precious and why water conservation is important - even though Earth is covered mostly by water, very little of it is fresh water that humans can easily use. Choice B is correct because it matches the table's $97%$ salt and $3%$ fresh, allowing students to identify the true comparison from options. Choice A is incorrect because it reverses to salt $3%$ and fresh $97%$, claiming the opposite. This misconception commonly occurs when students hastily read tables or assume fresh water dominates due to daily experiences, not grasping the magnitude of the difference ($97%$ to $3%$ means salt water is $32$ times more abundant, not just 'a little more'). To help students: Compare multiple choice options directly to table data, eliminating mismatches. Use role-play: Pretend to be scientists reporting findings. Emphasize ratios for deeper understanding. Watch for: quick reversals, influence of personal bias (e.g., 'I see more fresh water'), or incomplete table reading.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water is divided very unevenly: about 97% is salt water (in oceans) and only about 3% is fresh water. This means salt water is approximately 32 times more abundant than fresh water. Of the 3% that is fresh water, most (about 2% of total Earth's water) is frozen in ice caps and glaciers, and about 0.6% is groundwater. Rivers, lakes, and other accessible fresh water sources represent only about 0.01% of Earth's total water. This distribution explains why fresh water is considered precious and why water conservation is important - even though Earth is covered mostly by water, very little of it is fresh water that humans can easily use. Choice C is correct because it accurately reflects the data showing salt water is much more abundant than fresh water, at approximately 97% to 3% ratio. This demonstrates understanding that students can read data (percentages, graphs, or tables) and draw accurate conclusions about the dramatic difference in amounts between salt water and fresh water on Earth. Choice D is incorrect because it reverses the amounts, claiming fresh water is much more than salt water. This misconception commonly occurs when students see Earth has lots of water and assume it's mostly fresh and usable, when they misread graphs or percentages, or when they don't grasp the magnitude of the difference (97% to 3% means salt water is 32 times more abundant, not just 'a little more'). Some students may also confuse what they observe locally (rivers, lakes) with the global distribution. To help students: Create visual representations that make the difference dramatic - 97 blue blocks (salt water) and 3 green blocks (fresh water) out of 100 total. Use concrete comparison: If we had 100 cups of water, 97 would be salt water from oceans, only 3 would be fresh water. Create a large pie chart on floor with tape where students can physically see how small the fresh water section is. Practice reading percentages and comparing: Which is more, 97% or 3%? How much more? Connect to real-world: Why do we need to conserve water if Earth is mostly water? Because most is salt water we can't drink. Watch for: students who think 'water is water' without distinguishing salt vs. fresh, who don't understand percentages well enough to compare 97% vs. 3%, who misread graphs (confusing which section is which), or who know salt water is more but don't grasp how dramatically more.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water is divided very unevenly: about 97% is salt water (in oceans) and only about 3% is fresh water. This means salt water is approximately 32 times more abundant than fresh water. Of the 3% that is fresh water, most is frozen in ice caps and glaciers, with very little available for human use. Choice C is correct because it accurately states that salt water is about 97% and explicitly concludes this means it is 'much more than fresh water.' This shows students can both read the data correctly and draw the appropriate conclusion about the dramatic difference. Choice D is incorrect because it reverses the percentages, claiming fresh water is 97% of Earth's water. This misconception occurs when students misread tables or assume that because water is essential for life, fresh water must be the dominant type. To help students: Use concrete comparisons - if Earth's water filled a swimming pool, only enough to fill a small bucket would be fresh water. Create bar graphs where the salt water bar towers over the tiny fresh water bar. Have students write comparison statements using words like 'much more,' 'far greater,' or 'dramatically different' to describe 97% versus 3%. Connect to conservation: Ask why we need to save water if Earth is covered in water (because most is undrinkable salt water). Watch for: students who know one is more but don't grasp the magnitude of difference, who think 'about equal' because both are water, or who correctly identify salt water as more but underestimate how much more (thinking it's just 'a little bit more' rather than 32 times more).

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water is divided very unevenly: about $97%$ is salt water (in oceans) and only about $3%$ is fresh water. This means salt water is approximately $32$ times more abundant than fresh water. Of the $3%$ that is fresh water, most (about $2%$ of total Earth's water) is frozen in ice caps and glaciers, and about $0.6%$ is groundwater. Rivers, lakes, and other accessible fresh water sources represent only about $0.01%$ of Earth's total water. This distribution explains why fresh water is considered precious and why water conservation is important - even though Earth is covered mostly by water, very little of it is fresh water that humans can easily use. Choice C is correct because it states most Earth's water is salt water, supported by the $97%$ table data, demonstrating evidence-based reasoning. Choice B is incorrect because it claims most is fresh water, reversing the distribution. This misconception commonly occurs when students think of 'most water' as usable and fresh, or misread percentages, not grasping the magnitude of the difference ($97%$ to $3%$ means salt water is $32$ times more abundant, not just 'a little more'). To help students: Analyze statements for data support, crossing out unsupported ones. Create class charts comparing 'most' vs. 'least'. Discuss global vs. local perspectives. Watch for: conflating 'most visible' with 'most abundant', percentage confusion, or partial data use.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). Earth's water distribution shows a dramatic imbalance: about 97% is salt water (in oceans) and only about 3% is fresh water. This means salt water is approximately 32 times more abundant than fresh water, making fresh water a precious and limited resource despite Earth being covered mostly by water. Choice C is correct because it accurately states the conclusion supported by the data: salt water is far more abundant than fresh water, with the specific percentages of 97% to 3%. This demonstrates understanding that students can read data and draw accurate conclusions about the dramatic difference in amounts. Choice B is incorrect because it completely reverses the relationship, claiming most of Earth's water is fresh water when the data shows fresh water is only 3%. This misconception commonly occurs when students think about the water they see and use daily (fresh water from taps, rivers, lakes) and assume this represents most of Earth's water, not realizing the vast oceans contain 97% of all water. To help students: Create a 100-square grid and color 97 squares blue (salt water) and only 3 squares green (fresh water) to visualize the dramatic difference. Use concrete examples: In a swimming pool with 100 gallons, 97 gallons would be salt water and only 3 gallons would be fresh. Discuss why this matters: Even though Earth has lots of water, very little is fresh water we can drink. Watch for: students who confuse local observations with global data, who misread the table, or who select extreme answers like D (all water is salt water) without checking the data.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). The table data shows fresh water is only 3% of Earth's total water, while salt water is 97%. This means fresh water is indeed 'tiny' compared to the vast amount of salt water in Earth's oceans. Despite water covering most of Earth's surface, the fresh water that humans and most life depends on represents just a small fraction of the total. Choice A is correct because it accurately describes fresh water as a 'tiny 3%' compared to the dominant '97% salt water.' This demonstrates understanding that students can read data and interpret what these percentages mean about relative abundance. Choice C is incorrect because it reverses the percentages, claiming fresh water is 97% and salt water is 3%. This misconception commonly occurs when students think about the importance of fresh water to life and assume it must be the larger amount, or when they misread the table by matching the wrong percentage to each water type. To help students: Use a 100-bead string with 97 blue beads (salt water) and only 3 white beads (fresh water) to show how 'tiny' the fresh water portion is. Create analogies: 'If Earth's water filled a bathtub, only 3 teaspoons would be fresh water.' Have students survey 100 drops of water, making 97 salty and 3 fresh, to experience the ratio. Emphasize reading tables carefully: finger-trace from 'fresh water' to its percentage. Watch for: students who reverse percentages, who confuse importance with abundance, or who don't understand that 'tiny' accurately describes 3% compared to 97%.

This question tests students' ability to use data to compare the amounts of salt water and fresh water on Earth (NGSS 5-ESS2-2). According to the table, salt water makes up 97% of Earth's water while fresh water is only 3%. This means salt water is by far the greater percentage, comprising nearly all of Earth's water. The vast oceans contain almost all of our planet's water, while fresh water sources like rivers, lakes, and groundwater represent just a tiny fraction. Choice C is correct because it identifies salt water as making up the greater percentage at 97% of Earth's total water. This demonstrates that students can read data from tables and compare percentages to determine which is larger. Choice A is incorrect because while it correctly identifies fresh water, it assigns the wrong percentage of 97% to fresh water when fresh water is actually only 3%. This misconception may occur when students correctly identify that fresh water is important for life and incorrectly assume the important water type must be the most abundant. To help students: Create clear visual comparisons showing 97% versus 3% using pie charts, bar graphs, or 100-square grids. Practice reading tables systematically: 'Find salt water, trace across to its percentage.' Use memorable phrases: 'Salty seas are super-sized (97%), fresh water is frustratingly few (3%).' Have students create their own data displays from the table. Watch for: students who correctly identify water types but mix up percentages, who assume the water they use most (fresh) must be most abundant, or who struggle to trace across rows in tables accurately.