2nd Grade Science Quiz
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STRUCTURE AND PROPERTIES OF MATTER
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Look at these changes. Which are reversible? Use evidence and reasons to explain your claim.
A
Butter melted on warm bread, and when we cooled it, it became solid again. Bread toasted and turned brown, and cooling did not make it bread again. So butter melting is reversible, but toasting bread is not, because only butter changed back when cooled.
B
Both are reversible because both changes happened with heat. If we cool the toast, it will un-toast. The butter will also get hard.
C
Butter is reversible and toast is not reversible. I claim this because my teacher said so, not because of the test.
D
The butter was yellow and the toast was brown. Brown means it is not reversible. Yellow means it is reversible.
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