An 11-question knowledge check for 2nd grade science on NGSS 2-PS1-4. Students decide whether heating or cooling causes four changes, from juice turning into a frozen pop to a raw egg frying. Next they judge three changes as reversible or not and pick the best evidence for each. A question about baked cake closes the four pages. The answer key gives every choice and a model explanation for question 11.
2-PS1-4
“Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot.”
Section 2 pairs each reversible or not reversible choice with an evidence statement in questions 6, 8, and 10. Question 11 asks for a written argument about the cake.
Questions 1 to 4 show water freezing into ice cubes, butter melting in a pan, juice becoming a frozen pop, and an egg cooking. Students tick Heating or Cooling for each.
A short box defines reversible and irreversible changes. For melted chocolate, a frozen leaf, and a melting ice cube, students choose Reversible or Not Reversible, then tick one of two evidence statements.
Question 11 asks whether a baked cake can turn back into liquid batter. Students write their own explanation using evidence.
After a melting demo
Melt a square of chocolate and let it set again before you hand this out. Students have then seen the evidence that question 6 asks for.
Spot the distractor
The wrong evidence options are true facts, such as ice cubes being cold to touch. Talk through why a true fact is not always evidence for the claim.
Grading question 11
Grade the cake question on its own. A student who says the cake cannot go back but gives no reason has the claim without the evidence.
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