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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 14 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 was kept the same in this test?
  2. 2. What would happen to a melted ice cube left in a freezer?
  3. 3. Which changes went back when things cooled?
  4. 4. Why is toast different from melted chocolate?
2.Which is the best evidence that a change can be reversed?
  • A.The material looks nice afterward
  • B.The change happened quickly
  • C.The material goes back to how it was when it is cooled or warmed again
3.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It is a change that cannot be undone
  • B.It is the same as melting
  • C.It undoes itself overnight
4.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Heat it more
  • B.Smell it
  • C.Let it cool and see if it goes hard again
5.Why heat every material on the same plate?
  • A.So it is quicker
  • B.So the heating is the same and only the material is different
  • 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 changes could be reversed by cooling
  • C.Both were burnt
7.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

LessonPrint · 2-PS1-4 · Set 14 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 14. Prints on its own sheet.

  1. 1.1. All the things were heated on the same plate. 2. It would go back to solid, like the chocolate went hard again. 3. The chocolate, the butter and the water all went back. 4. The toast stayed toast when it cooled, but the chocolate went hard again.
  2. 2.The material goes back to how it was when it is cooled or warmed again
  3. 3.It is a change that cannot be undone
  4. 4.Let it cool and see if it goes hard again
  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.Melting chocolate is a change that can be reversed

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