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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 21 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 was kept the same in this test?
  4. 4. What happened to the chocolate?
2.Butter and chocolate both melted and went hard again. What do these two have in common?
  • A.Both changes could be reversed by cooling
  • B.Both were burnt
  • C.Neither changed at all
3.Water turned to steam, and drops formed on the lid. What does that show?
  • A.The water came back, so boiling it can be reversed
  • B.The water was destroyed
  • C.Lids make water
4.Toast stayed toast when it cooled. What would a student say about toasting?
  • A.It is the same as melting
  • B.It undoes itself overnight
  • C.It is a change that cannot be undone
5.Melted chocolate went hard again when it cooled. What does that show?
  • A.Melting chocolate is a change that can be reversed
  • B.All changes go back
  • C.Chocolate cannot be heated
6.Which change in the record could NOT be reversed?
  • A.Bread turning to toast
  • B.Chocolate melting
  • C.Butter melting
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 21 · free to copy for classroom use

Answer key — Heated, Then Cooled Again

Set 21. 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. All the things were heated on the same plate. 4. It melted, then went hard again.
  2. 2.Both changes could be reversed by cooling
  3. 3.The water came back, so boiling it can be reversed
  4. 4.It is a change that cannot be undone
  5. 5.Melting chocolate is a change that can be reversed
  6. 6.Bread turning to toast
  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.