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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 15 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. What claim does this record support?
  2. 2. What would happen to a melted ice cube left in a freezer?
  3. 3. Why is toast different from melted chocolate?
  4. 4. Which changes went back when things cooled?
2.Which is the best evidence that a change can be reversed?
  • A.The material goes back to how it was when it is cooled or warmed again
  • B.The change happened quickly
  • C.The material looks nice afterward
3.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 tidier
  • C.So it is quicker
4.Water turned to steam, and drops formed on the lid. What does that show?
  • A.The water was destroyed
  • B.The water came back, so boiling it can be reversed
  • C.Lids make water
5.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
6.Melted chocolate went hard again when it cooled. What does that show?
  • A.Melting chocolate is a change that can be reversed
  • B.Chocolate cannot be heated
  • C.All changes go back
7.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Cooking an egg is a change that cannot be reversed
  • B.Eggs are always solid
  • C.Cooling undoes every change

LessonPrint · 2-PS1-4 · Set 15 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 15. Prints on its own sheet.

  1. 1.1. Some changes caused by heating can be reversed and some cannot. 2. It would go back to solid, like the chocolate went hard again. 3. The toast stayed toast when it cooled, but the chocolate went hard again. 4. The chocolate, the butter and the water all went back.
  2. 2.The material goes back to how it was when it is cooled or warmed again
  3. 3.So the heating is the same and only the material is different
  4. 4.The water came back, so boiling it can be reversed
  5. 5.The chocolate went hard again when it cooled
  6. 6.Melting chocolate is a change that can be reversed
  7. 7.Cooking an egg is a change that cannot be reversed

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