Here's the solution to the “What Type” questions based on the descriptions provided in the worksheet:
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1. What type of rock might contain evidence of past life?
✔ Sedimentary
> *Explanation:* The description for Sedimentary rocks says: “Many sedimentary rocks contain fossils of plants or animals.” Fossils are direct evidence of past life.
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2. What type of rock contains large crystals?
✔ Igneous
> *Explanation:* The Igneous rock description states: “Magma produced igneous rocks have large mineral crystals that formed inside the Earth.” Slow cooling underground allows time for large crystals to grow.
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3. What type of rock might contain holes from gases?
✔ Igneous
> *Explanation:* The Igneous section mentions: “Lava produced igneous rocks can have gas bubbles…” These gas bubbles leave behind holes (vesicles) when the lava cools quickly on the surface.
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4. What type of rock has visible flat layers?
✔ Sedimentary
> *Explanation:* Sedimentary rocks are described as being “composed of rounded grains or fragments… cemented together in layers.” Layering (or bedding) is a key feature of sedimentary rocks.
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5. What type of rock changes by intense heat / pressure?
✔ Metamorphic
> *Explanation:* The Metamorphic rock description says: “Metamorphic rocks are formed inside the Earth from heat and pressure.” They form when existing rocks are altered by these conditions.
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6. What type of rock contains rounded grains?
✔ Sedimentary
> *Explanation:* The Sedimentary section begins: “Sedimentary rocks are composed of rounded grains or fragments of other rocks…” This refers to sediments like sand, silt, or pebbles that have been weathered, transported, and deposited.
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7. What type of rock comes from liquid rock material?
✔ Igneous
> *Explanation:* The Igneous description starts: “Igneous rocks are formed from molten rock.” Molten rock (magma or lava) is liquid rock material that solidifies to form igneous rocks.
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8. What type of rock has wavy banding / layers?
✔ Metamorphic
> *Explanation:* The Metamorphic description notes: “Visible layers may be bent or distorted.” This refers to foliation — wavy, banded, or layered structures caused by pressure during metamorphism (e.g., in gneiss or schist).
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✔ Final Answers Summary:
1. Sedimentary
2. Igneous
3. Igneous
4. Sedimentary
5. Metamorphic
6. Sedimentary
7. Igneous
8. Metamorphic
This worksheet helps reinforce how to classify rocks based on their formation processes and observable features!
Parent Tip: Review the logic above to help your child master the concept of rock classification worksheet.
