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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 23 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. Why is toast different from melted chocolate?
  3. 3. What happened to the bread?
  4. 4. What claim does this record support?
2.Wax melts in a warm dish. What test would show whether the change can be reversed?
  • A.Smell it
  • B.Heat it more
  • C.Let it cool and see if it goes hard again
3.A student says "heating always changes things for good." Which result shows that is wrong?
  • A.The bread turned to toast
  • B.The chocolate went hard again when it cooled
  • C.The egg turned solid
4.An egg turned solid when heated and stayed solid when cooled. What does that show?
  • A.Cooling undoes every change
  • B.Eggs are always solid
  • C.Cooking an egg is a change that cannot be reversed
5.Which change in the record could NOT be reversed?
  • A.Butter melting
  • B.Bread turning to toast
  • C.Chocolate melting
6.Butter and chocolate both melted and went hard again. What do these two have in common?
  • A.Both were burnt
  • B.Neither changed at all
  • C.Both changes could be reversed by cooling
7.Why heat every material on the same plate?
  • A.So it is tidier
  • B.So the heating is the same and only the material is different
  • C.So it is quicker

LessonPrint · 2-PS1-4 · Set 23 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 23. Prints on its own sheet.

  1. 1.1. All the things were heated on the same plate. 2. The toast stayed toast when it cooled, but the chocolate went hard again. 3. It turned to toast, and it stayed toast. 4. Some changes caused by heating can be reversed and some cannot.
  2. 2.Let it cool and see if it goes hard again
  3. 3.The chocolate went hard again when it cooled
  4. 4.Cooking an egg is a change that cannot be reversed
  5. 5.Bread turning to toast
  6. 6.Both changes could be reversed by cooling
  7. 7.So the heating is the same and only the material is different

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