This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like melting in a sealed cup, where 40 g ice particles become liquid water particles but remain enclosed, preserving the total weight. Choice A is correct because it provides a causative explanation: the ice changed to water but the same particles stayed in the cup, showing conservation keeps the amount of matter unchanged. Choice B represents incorrect reasoning: it claims melting makes things lighter but the cup compensates, which contradicts conservation with unfounded compensation. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so the ice particles became water particles but stayed inside'; visualize '40 g ice = 40 g water—same particles, different state.' Inquire 'Why does the sealed cup matter?' to highlight system boundaries.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like freezing, where 180 g water particles organize into solid ice but the total amount stays the same without any addition or loss. Choice B is correct because it provides a causative explanation: the particles were still all there, only their arrangement changed, showing that weight remained constant as matter was conserved in amount despite the phase shift. Choice D represents incorrect reasoning: it claims water partly disappeared but the container got heavier, which contradicts conservation by implying matter loss and magical compensation. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all the water particles are still there as ice, just in a solid arrangement'; have them visualize 'The 180 g liquid particles froze into 180 g solid particles—same number, different spacing.' Probe with 'Why doesn't freezing change the total matter?' to build causal links.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like dissolving or mixing, so the total weight stays constant as particles rearrange but remain the same in amount, such as when 15 g sugar particles spread between 200 g water particles to form a 215 g solution without any matter lost or gained. Choice B is correct because it provides a causative explanation: matter was not created or destroyed, the same particles were still there, demonstrating that conservation means the total amount of matter stays the same even after dissolving. Choice A represents incorrect reasoning: it claims the sugar disappeared and water became heavier, which contradicts conservation by suggesting matter can vanish and be compensated elsewhere without explaining the unchanged total weight based on particle persistence. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all the particles from the sugar and water are still there, just mixed together'; practice tracing particles by saying 'The 15 g sugar particles didn't disappear—they're spread out in the water, keeping the total at 215 g.' Always ask 'Why does the weight stay the same?' to distinguish observation from causal explanation based on conservation of matter.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like heating in a closed container, where 150 g water particles gain energy but stay inside, maintaining the total weight without evaporation or loss. Choice C is correct because it provides a causative explanation: no matter was created or destroyed, the same particles stayed inside, showing weight constancy due to conserved matter despite temperature change. Choice B represents incorrect reasoning: it claims water turned into energy but energy weighs the same, which confuses matter-energy conversion and contradicts basic conservation. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all the water particles remained inside even when heated'; emphasize '150 g water at room temp = 150 g warmer water—same particles, more motion.' Question 'Why didn't heating make it lighter?' to reinforce closed-system effects.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during chemical changes like reactions in a sealed container, where atoms from 10 g baking soda and 50 g vinegar rearrange into new substances including gas, but the total 60 g remains because no matter escapes. Choice C is correct because it provides a causative explanation: matter stayed in the sealed bottle, particles rearranged but none escaped, illustrating that weight stayed the same as the amount of matter was conserved despite fizzing. Choice D represents incorrect reasoning: it claims some matter was destroyed but the rest became heavier, which contradicts conservation by suggesting matter can be destroyed and compensated without particle continuity. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all particles stayed inside the sealed bottle, just rearranged into new forms including gas'; practice with 'The 60 g of reactants became 60 g of products—same atoms, different combinations.' Emphasize asking 'Why didn't the gas make the weight change?' to connect sealing to matter retention.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like melting, where ice particles rearrange into liquid water but the total amount remains the same, so 60 g of ice equals 60 g of water in a sealed bag with no particles added or removed. Choice A is correct because it provides a causative explanation: matter was conserved, the same particles became liquid but stayed inside, showing that the weight stayed the same because the amount of matter didn't change despite the form shifting. Choice C represents incorrect reasoning: it claims ice was destroyed and new water created, which contradicts conservation by suggesting matter can be destroyed and created rather than rearranged. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so the ice particles are still there as water particles in a different arrangement'; have them trace particles with 'The 60 g ice particles became 60 g water particles—same amount, just flowing now.' Distinguish observation from explanation by asking 'Why does conservation mean the weight didn't change even though it looks different?'

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during chemical changes like reactions in a sealed container, where atoms from 10 g baking soda and 50 g vinegar rearrange into new substances including gas, but the total 60 g remains because no matter escapes. Choice C is correct because it provides a causative explanation: matter stayed in the sealed bottle, particles rearranged but none escaped, illustrating that weight stayed the same as the amount of matter was conserved despite fizzing. Choice D represents incorrect reasoning: it claims some matter was destroyed but the rest became heavier, which contradicts conservation by suggesting matter can be destroyed and compensated without particle continuity. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all particles stayed inside the sealed bottle, just rearranged into new forms including gas'; practice with 'The 60 g of reactants became 60 g of products—same atoms, different combinations.' Emphasize asking 'Why didn't the gas make the weight change?' to connect sealing to matter retention.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like freezing, where 180 g water particles organize into solid ice but the total amount stays the same without any addition or loss. Choice B is correct because it provides a causative explanation: the particles were still all there, only their arrangement changed, showing that weight remained constant as matter was conserved in amount despite the phase shift. Choice D represents incorrect reasoning: it claims water partly disappeared but the container got heavier, which contradicts conservation by implying matter loss and magical compensation. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all the water particles are still there as ice, just in a solid arrangement'; have them visualize 'The 180 g liquid particles froze into 180 g solid particles—same number, different spacing.' Probe with 'Why doesn't freezing change the total matter?' to build causal links.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like dissolving or mixing, so the total weight stays constant as particles rearrange but remain the same in amount, such as when 15 g sugar particles spread between 200 g water particles to form a 215 g solution without any matter lost or gained. Choice B is correct because it provides a causative explanation: matter was not created or destroyed, the same particles were still there, demonstrating that conservation means the total amount of matter stays the same even after dissolving. Choice A represents incorrect reasoning: it claims the sugar disappeared and water became heavier, which contradicts conservation by suggesting matter can vanish and be compensated elsewhere without explaining the unchanged total weight based on particle persistence. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so all the particles from the sugar and water are still there, just mixed together'; practice tracing particles by saying 'The 15 g sugar particles didn't disappear—they're spread out in the water, keeping the total at 215 g.' Always ask 'Why does the weight stay the same?' to distinguish observation from causal explanation based on conservation of matter.

This question tests the ability to use evidence from measurements to explain that matter is conserved during physical and chemical changes (NGSS 5-PS1-2). Students must provide causative reasoning, not just state the observation. The fundamental principle of conservation of matter is that matter cannot be created or destroyed during physical changes like dissolving, where 20 g salt particles separate and mix invisibly with 100 g water particles, resulting in a 120 g solution with all matter intact. Choice A is correct because it provides a causative explanation: the salt broke into invisible pieces but was still in the water, illustrating that weight stayed the same as particles persisted despite visibility change. Choice B represents incorrect reasoning: it claims salt was destroyed, leaving only water, which contradicts conservation by suggesting matter destruction. To help students explain conservation, use sentence frames like 'The weight stayed the same because matter cannot be created or destroyed, so the salt particles are still there, just dissolved and invisible'; trace with '20 g salt + 100 g water = 120 g solution—same particles, spread out.' Ask 'Why does dissolving not reduce weight?' to address misconceptions about disappearance.