This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. Dry ice undergoes sublimation—it changes directly from solid to gas without becoming liquid first, but the carbon dioxide particles still exist, they've just spread into the air as an invisible gas. Choice A is correct because it accurately states that the particles still exist and moved into the air as gas, demonstrating understanding that sublimation is a physical change where matter is conserved. Choice D represents the misconception that particles can leave our world or dimension, showing magical thinking rather than scientific understanding that particles must go somewhere within our physical world. To help students: If possible, use dry ice in a sealed container to show fog formation and pressure increase, proving particles are still present. Emphasize that all physical changes involve particles moving or rearranging, never disappearing from existence.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When sugar dissolves in tea, the solid sugar particles separate from each other and spread throughout the liquid, becoming too small and dispersed to see individually—but they still exist, which is why the tea tastes sweet. Choice A is correct because it accurately states that the particles still exist and spread throughout the tea, demonstrating understanding that dissolving is a physical change where particles are conserved, not destroyed. Choice D represents the misconception that sugar particles transform into tea particles, when actually sugar particles remain sugar particles but are now mixed with water particles. To help students: Use a demonstration where sugar is dissolved in water in a sealed container, showing the mass stays the same. Have students trace particles: 'The sugar particles were in the cube. Now they are spread throughout the tea.' Watch for students who think dissolving means particles change into different substances.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When dry ice sublimes, it changes directly from solid to gas—the carbon dioxide particles spread into the air but still exist, just in a different state and location where we can't see them. Choice A is correct because it accurately states that the particles still exist and moved into the air as gas, demonstrating understanding that sublimation is a physical change where particles are conserved. Choice B represents the misconception that particles can leave our physical world entirely, failing to understand that matter cannot be created or destroyed in everyday changes. To help students: If possible, demonstrate dry ice in a sealed clear container to show fog formation (evidence of gas particles). Explicitly teach that particles changing state (solid to gas) is different from particles being destroyed—use the analogy of ice cubes melting (solid to liquid) where we can still see the water.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When salt dissolves in water, the salt crystals separate into individual salt particles that spread throughout the water—they're too small and dispersed to see, but they still exist, which is why the water would taste salty. Choice A is correct because it accurately states that the particles still exist and are spread throughout the water, demonstrating understanding that dissolving is a physical change where particles are conserved. Choices B, C, and D represent misconceptions that particles disappear when invisible, can be destroyed, or turn into energy, failing to recognize that dissolved substances retain their particles. To help students: Have them taste the salt water (safely) or let the water evaporate to recover the salt crystals, proving the salt particles were present all along even when dissolved.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When water seems to 'disappear' from a puddle through evaporation, the water particles don't actually vanish—they move from the liquid puddle into the air as water vapor (gas), spreading far apart and becoming invisible to our eyes. Choice A is correct because it accurately states that the particles still exist and describes where they went (moved into the air as gas), demonstrating understanding that particles are conserved during state changes. Choices B, C, and D represent the misconception that particles can be destroyed or fundamentally changed into different substances—this error occurs because students incorrectly think 'cannot see' equals 'does not exist' or believe water particles can transform into air particles rather than simply moving into the air. To help students: Use closed-system demonstrations like sealing a wet paper towel in a plastic bag to show water vapor collecting on the bag's sides, proving the water particles still exist even when the towel appears dry.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When nail polish remover (acetone) evaporates from a counter, the liquid particles spread apart and move into the air as gas—they're invisible but still present, which is why you can still smell them. Choice B is correct because it accurately states that the particles still exist and moved into the air as gas, showing understanding of conservation of matter during evaporation. Choice D represents the misconception that acetone particles transform into air particles, failing to understand that acetone particles remain acetone particles even when mixed with air in the gas state. To help students: Use the smell as evidence—if particles were destroyed or changed into air, there would be no acetone smell. Have students trace: 'The acetone particles were on the counter. Now they are in the air around us.'

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. Moth balls sublime slowly over time, meaning the solid particles change directly to gas and spread into the air—the particles still exist but are now dispersed throughout the closet air where we can't see them. Choice A is correct because it accurately states that the particles still exist and moved into the air as gas, demonstrating understanding that sublimation conserves matter at the particle level. Choice C represents the misconception that moth ball particles transform into air particles, when actually they remain moth ball particles (naphthalene or paradichlorobenzene) mixed with air particles. To help students: Discuss how we can smell moth balls even when they're getting smaller—evidence that particles are entering the air. Use a sealed container demonstration if possible to show that mass is conserved even as the solid disappears.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When sugar dissolves in lemonade, the solid sugar particles separate and spread throughout the liquid, becoming too small and dispersed to see—but they still exist, which is why the lemonade tastes sweet. Choice A is correct because it accurately states that the particles still exist and are spread throughout the lemonade, demonstrating understanding that dissolving conserves particles. Choices B, C, and D represent misconceptions that particles are absorbed and cease to exist, disappear when the solution looks clear, or change into different particles—these errors occur because students confuse mixing at the particle level with destruction or transformation. To help students: Have students taste unsweetened versus sweetened lemonade to prove invisible sugar particles are present; use particle diagrams showing sugar particles between liquid particles.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When salt dissolves, the crystal structure breaks apart and individual salt particles spread throughout the water—they become invisible because they're separated and surrounded by water particles, but they still exist. Choice A is correct because it accurately states that the particles still exist and spread out through the water, demonstrating understanding that dissolving is a physical change where particles disperse but are conserved. Choice C represents the misconception that clear appearance means absence of particles, failing to recognize that dissolved particles are simply too small and spread out to see. To help students: Use taste tests to prove invisible salt particles are present in clear-looking water. Demonstrate with a sealed container that mass stays the same when salt dissolves, proving particles weren't destroyed.

This question tests understanding that particles of matter still exist even when matter appears to disappear from view (NGSS 5-PS1-1). Students must apply the concept of conservation of matter at the particle level. When sugar dissolves in tea, the solid sugar cube breaks apart into individual sugar particles that spread throughout the liquid—they're too small and dispersed to see individually, but they still exist, which is why the tea tastes sweet. Choice A is correct because it accurately states that the particles still exist and spread throughout the tea, demonstrating understanding that dissolving is a physical change where particles separate and disperse but are not destroyed. Choices B, C, and D represent misconceptions that particles can be destroyed by heat, become nothing, or shrink until they disappear—these errors occur because students confuse 'cannot see' with 'does not exist' and don't understand that dissolved substances retain their particle identity. To help students: Demonstrate conservation by having students weigh sugar and water separately, then weigh the solution to show mass is conserved, proving all particles still exist even though the sugar is invisible.