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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 9 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 happened to the bread?
  3. 3. What would happen to a melted ice cube left in a freezer?
  4. 4. What happened to the chocolate?
2.Why heat every material on the same plate?
  • A.So it is quicker
  • B.So it is tidier
  • C.So the heating is the same and only the material is different
3.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
4.Which is the best evidence that a change can be reversed?
  • A.The change happened quickly
  • B.The material goes back to how it was when it is cooled or warmed again
  • C.The material looks nice afterward
5.Water turned to steam, and drops formed on the lid. What does that show?
  • A.Lids make water
  • B.The water came back, so boiling it can be reversed
  • C.The water was destroyed
6.Melted chocolate went hard again when it cooled. What does that show?
  • A.All changes go back
  • B.Chocolate cannot be heated
  • C.Melting chocolate is a change that can be reversed
7.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Let it cool and see if it goes hard again
  • B.Heat it more
  • C.Smell it

LessonPrint · 2-PS1-4 · Set 9 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 9. Prints on its own sheet.

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

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