Melt, Freeze, Boil, Cool is a free printable Grade 2 science worksheet on predicting what heating or cooling will do to a material, aligned to NGSS performance expectation 2-PS1-4. It prints 8 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.
1.Chocolate is warmed in a bowl over hot water. What happens?
A.It turns hard and black
B.It disappears
C.It melts into a runny liquid
2.A puddle sits in the hot sun all afternoon. What happens to it?
A.It gets deeper
B.It freezes
C.It dries up as the water goes into the air
3.An egg is boiled for ten minutes and then cooled. Will it go runny again?
A.Yes, if you shake it
B.Yes, as soon as it cools
C.No, cooking it is a change that cannot be undone
4.Cake batter is baked in the oven. Can the cake be turned back into batter?
A.Yes, by adding water
B.Yes, by cooling it
C.No, baking makes a change that cannot be undone
5.A snowman is left in the spring sunshine. What happens to it?
A.It grows bigger
B.It turns into ice cream
C.It melts into water
6.Butter is left in a warm kitchen all day. What happens?
A.It turns to ice
B.It goes hard
C.It goes soft and may melt
7.The melted lolly is put back in the freezer. What happens?
A.It freezes solid again
B.It stays runny for ever
C.It turns into steam
8.A cold can is taken out of the fridge on a warm day. What appears on the outside?
A.Nothing at all
B.Tiny drops of water
C.Ice cubes
LessonPrint · 2-PS1-4 · Set 1 · free to copy for classroom use
Answer key — Melt, Freeze, Boil, Cool
Set 1. Prints on its own sheet.
1.It melts into a runny liquid
2.It dries up as the water goes into the air
3.No, cooking it is a change that cannot be undone
4.No, baking makes a change that cannot be undone
5.It melts into water
6.It goes soft and may melt
7.It freezes solid again
8.Tiny drops of water
Questions about Melt, Freeze, Boil, Cool
What does the Melt, Freeze, Boil, Cool worksheet cover?
It practices predicting what heating or cooling will do to a material — 8 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 “Circle the best answer”, and the answer key follows on the next sheet.
Which NGSS performance expectation does Melt, Freeze, Boil, Cool 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?
Melt, Freeze, Boil, Cool 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 Melt, Freeze, Boil, Cool come with an answer key?
Yes. All 8 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 Melt, Freeze, Boil, Cool 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 Melt, Freeze, Boil, Cool free to print and photocopy?
Yes. Melt, Freeze, Boil, Cool, 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.