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Heated, Then Cooled Again is a free printable Grade 2 science worksheet on using a heating record as evidence for which changes reverse, aligned to NGSS performance expectation 2-PS1-4. It prints 7 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 16 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Heated, Then Cooled Again

2-PS1-4

NameDate

Read the record, then answer the questions.

1.Read the record, then answer the questions.

Heated, Then Cooled Again

What happened to four things heated on a warm plate and then left to cool. HEATED, THEN LEFT TO COOL Chocolate ..... melted, then went hard again Butter ........ melted, then went hard again Water ......... turned to steam; the lid dripped water again Bread ......... turned to toast; it stayed toast Egg ........... turned solid; it stayed solid All were heated on the same plate.

  1. 1. Which changes went back when things cooled?
  2. 2. What happened to the bread?
  3. 3. What would happen to a melted ice cube left in a freezer?
  4. 4. What was kept the same in this test?
2.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Cooling undoes every change
  • B.Cooking an egg is a change that cannot be reversed
  • C.Eggs are always solid
3.Melted chocolate went hard again when it cooled. What does that show?
  • A.All changes go back
  • B.Melting chocolate is a change that can be reversed
  • C.Chocolate cannot be heated
4.A student says "heating always changes things for good." Which result shows that is wrong?
  • A.The egg turned solid
  • B.The chocolate went hard again when it cooled
  • C.The bread turned to toast
5.Why heat every material on the same plate?
  • A.So the heating is the same and only the material is different
  • B.So it is quicker
  • C.So it is tidier
6.Butter and chocolate both melted and went hard again. What do these two have in common?
  • A.Neither changed at all
  • B.Both were burnt
  • C.Both changes could be reversed by cooling
7.Which change in the record could NOT be reversed?
  • A.Butter melting
  • B.Chocolate melting
  • C.Bread turning to toast

LessonPrint · 2-PS1-4 · Set 16 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 16. Prints on its own sheet.

  1. 1.1. The chocolate, the butter and the water all went back. 2. It turned to toast, and it stayed toast. 3. It would go back to solid, like the chocolate went hard again. 4. All the things were heated on the same plate.
  2. 2.Cooking an egg is a change that cannot be reversed
  3. 3.Melting chocolate is a change that can be reversed
  4. 4.The chocolate went hard again when it cooled
  5. 5.So the heating is the same and only the material is different
  6. 6.Both changes could be reversed by cooling
  7. 7.Bread turning to toast

Last reviewed 2026-09-05. Aligned to 2-PS1-4 of the Next Generation Science Standards.