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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.

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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 would happen to a melted ice cube left in a freezer?
  2. 2. What was kept the same in this test?
  3. 3. Why is toast different from melted chocolate?
  4. 4. What claim does this record support?
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.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.Smell it
  • C.Heat it more
4.Which change in the record could NOT be reversed?
  • A.Butter melting
  • B.Bread turning to toast
  • C.Chocolate melting
5.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
6.Water turned to steam, and drops formed on the lid. What does that show?
  • A.Lids make water
  • B.The water was destroyed
  • C.The water came back, so boiling it can be reversed
7.Which is the best evidence that a change can be reversed?
  • A.The material looks nice afterward
  • B.The material goes back to how it was when it is cooled or warmed again
  • C.The change happened quickly

LessonPrint · 2-PS1-4 · Set 7 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 7. Prints on its own sheet.

  1. 1.1. It would go back to solid, like the chocolate went hard again. 2. All the things were heated on the same plate. 3. The toast stayed toast when it cooled, but the chocolate went hard again. 4. Some changes caused by heating can be reversed and some cannot.
  2. 2.So the heating is the same and only the material is different
  3. 3.Let it cool and see if it goes hard again
  4. 4.Bread turning to toast
  5. 5.Both changes could be reversed by cooling
  6. 6.The water came back, so boiling it can be reversed
  7. 7.The material goes back to how it was when it is cooled or warmed again

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