Arguing About Reversible Changes - 2nd Grade Science
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Which observation is stronger evidence of reversibility: “It got warm” or “It melted and refroze”?
Which observation is stronger evidence of reversibility: “It got warm” or “It melted and refroze”?
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“It melted and refroze.”. Shows the complete cycle of state changes proves reversibility.
“It melted and refroze.”. Shows the complete cycle of state changes proves reversibility.
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Which observation best supports irreversibility: “It cooled down” or “It burned and became ash”?
Which observation best supports irreversibility: “It cooled down” or “It burned and became ash”?
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“It burned and became ash.”. Burning creates new substances through irreversible chemical reactions.
“It burned and became ash.”. Burning creates new substances through irreversible chemical reactions.
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What is the best conclusion if a material melts when heated and becomes solid again when cooled?
What is the best conclusion if a material melts when heated and becomes solid again when cooled?
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The change is reversible. The material cycles between states without permanent change.
The change is reversible. The material cycles between states without permanent change.
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What is the best conclusion if heating makes a new material that cooling cannot undo?
What is the best conclusion if heating makes a new material that cooling cannot undo?
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The change is irreversible. New substances form that cannot return to original materials.
The change is irreversible. New substances form that cannot return to original materials.
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Which sentence is a clear claim: “The wax melted” or “Wax melting is reversible”?
Which sentence is a clear claim: “The wax melted” or “Wax melting is reversible”?
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“Wax melting is reversible.”. Claims state what can happen, not just what did happen.
“Wax melting is reversible.”. Claims state what can happen, not just what did happen.
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Which sentence is evidence: “Cooking is irreversible” or “The batter turned into a solid cake”?
Which sentence is evidence: “Cooking is irreversible” or “The batter turned into a solid cake”?
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“The batter turned into a solid cake.”. Evidence describes specific observations, not general conclusions.
“The batter turned into a solid cake.”. Evidence describes specific observations, not general conclusions.
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What is the best claim if you can reverse a change by heating and then cooling?
What is the best claim if you can reverse a change by heating and then cooling?
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The temperature change can be reversed. Both heating and cooling restore original states in reversible changes.
The temperature change can be reversed. Both heating and cooling restore original states in reversible changes.
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What is the best claim if cooling a changed material does not bring back the original?
What is the best claim if cooling a changed material does not bring back the original?
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The temperature change cannot be reversed. Irreversible changes create permanent new materials.
The temperature change cannot be reversed. Irreversible changes create permanent new materials.
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What is a reversible temperature change?
What is a reversible temperature change?
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A change that can be undone to return to the starting state. The material returns to its original form when conditions change back.
A change that can be undone to return to the starting state. The material returns to its original form when conditions change back.
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What evidence best shows a change is reversible?
What evidence best shows a change is reversible?
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Doing the opposite temperature change returns the material to its start. Reversible changes allow materials to cycle between states.
Doing the opposite temperature change returns the material to its start. Reversible changes allow materials to cycle between states.
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Which claim is stronger: “It changed” or “It is reversible because it can change back”?
Which claim is stronger: “It changed” or “It is reversible because it can change back”?
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“It is reversible because it can change back.”. It includes both a claim and supporting evidence.
“It is reversible because it can change back.”. It includes both a claim and supporting evidence.
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What two parts should a simple science argument include for this topic?
What two parts should a simple science argument include for this topic?
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A claim and evidence from observations. Arguments need a statement (claim) and proof (evidence).
A claim and evidence from observations. Arguments need a statement (claim) and proof (evidence).
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Which sentence is the claim: “The ice melted” or “Melting is a reversible change”?
Which sentence is the claim: “The ice melted” or “Melting is a reversible change”?
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“Melting is a reversible change.”. This states what type of change melting is.
“Melting is a reversible change.”. This states what type of change melting is.
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What does it mean when a temperature change is reversible?
What does it mean when a temperature change is reversible?
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It can return to the original state when temperature changes back. The material returns to its original form when cooled or heated back.
It can return to the original state when temperature changes back. The material returns to its original form when cooled or heated back.
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What does it mean when a temperature change is not reversible?
What does it mean when a temperature change is not reversible?
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It cannot return to the original state, even if temperature changes back. The material permanently changes into something new.
It cannot return to the original state, even if temperature changes back. The material permanently changes into something new.
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