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 1 of 25 · the same problems every time you open this link.
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. What would happen to a melted ice cube left in a freezer?
2. Why is toast different from melted chocolate?
3. What claim does this record support?
4. What happened to the bread?
2.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
3.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
4.Toast stayed toast when it cooled. What would a student say about toasting?
A.It undoes itself overnight
B.It is the same as melting
C.It is a change that cannot be undone
5.Why heat every material on the same plate?
A.So it is tidier
B.So it is quicker
C.So the heating is the same and only the material is different
6.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
7.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
LessonPrint · 2-PS1-4 · Set 1 · free to copy for classroom use
Answer key — Heated, Then Cooled Again
Set 1. Prints on its own sheet.
1.1. It would go back to solid, like the chocolate went hard again. 2. The toast stayed toast when it cooled, but the chocolate went hard again. 3. Some changes caused by heating can be reversed and some cannot. 4. It turned to toast, and it stayed toast.
2.The water came back, so boiling it can be reversed
3.Melting chocolate is a change that can be reversed
4.It is a change that cannot be undone
5.So the heating is the same and only the material is different
6.Both changes could be reversed by cooling
7.The material goes back to how it was when it is cooled or warmed again
Questions about Heated, Then Cooled Again
What does the Heated, Then Cooled Again worksheet cover?
It practices using a heating record as evidence for which changes reverse — 7 questions for Grade 2, all on NGSS 2-PS1-4: Argue with evidence that some changes from heating or cooling undo and some do not. The instruction to students is “Read the record, then answer the questions”, and the answer key follows on the next sheet.
Which NGSS performance expectation does Heated, Then Cooled Again practice?
2-PS1-4, under Physical Science for Grade 2. The published performance expectation reads: “Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.” The worksheet assesses that performance expectation rather than a paraphrase of it.
What age or grade is this worksheet for?
Heated, Then Cooled Again is written for Grade 2, typically ages 7-8. It is one of the sheets on 2-PS1-4, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.
Does Heated, Then Cooled Again come with an answer key?
Yes. All 7 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Heated, Then Cooled Again can I print?
25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Heated, Then Cooled Again free to print and photocopy?
Yes. Heated, Then Cooled Again, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.
More practice for 2-PS1-4
Argue with evidence that some changes from heating or cooling undo and some do not.