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Earth Materials at Work is a free printable Grade 2 science worksheet on explaining why a rock, a soil or water suits the job it is used for, aligned to NGSS performance expectation 2-PS1-2. 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 9 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.

Earth Materials at Work

2-PS1-2

NameDate

Circle the best answer.

1.Why are sandbags piled up when a river is about to flood?
  • A.Wet sand is heavy and packs tight, so it holds back water
  • B.Sand drinks up the whole river
  • C.Sandbags float on top of the flood
2.Why is clay, not sand, used to make a pot?
  • A.Clay holds its shape when molded and hardens when it is fired
  • B.Clay is always red
  • C.Sand is too heavy
3.Why are old walls often built from blocks of hard rock?
  • A.Hard rock is soft to touch
  • B.Hard rock floats
  • C.Hard rock lasts a long time in wind and rain
4.Why is the hearth around a fireplace made of stone?
  • A.Stone keeps the fire out of sight
  • B.Stone does not burn and can take great heat
  • C.Stone is the softest material
5.Why do potters add water to dry clay?
  • A.Water changes clay into sand
  • B.Wet clay becomes soft enough to shape
  • C.Water makes clay harder
6.Why is salt spread on icy roads in winter?
  • A.It makes the ice melt, so the roads are less slippery
  • B.It feeds the plants by the road
  • C.It makes the roads shine
7.Why is sand put under the swings in a playground?
  • A.Sand keeps the swings dry
  • B.Loose sand is soft to land on
  • C.Sand makes the swings faster
8.Why are some dams built from rock with a core of packed clay?
  • A.Clay lets very little water through, and the rock is heavy and strong
  • B.Rock soaks up the water
  • C.Clay is light enough to float

LessonPrint · 2-PS1-2 · Set 9 · free to copy for classroom use

Answer key — Earth Materials at Work

Set 9. Prints on its own sheet.

  1. 1.Wet sand is heavy and packs tight, so it holds back water
  2. 2.Clay holds its shape when molded and hardens when it is fired
  3. 3.Hard rock lasts a long time in wind and rain
  4. 4.Stone does not burn and can take great heat
  5. 5.Wet clay becomes soft enough to shape
  6. 6.It makes the ice melt, so the roads are less slippery
  7. 7.Loose sand is soft to land on
  8. 8.Clay lets very little water through, and the rock is heavy and strong

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