Igneous Rocks Worksheet
Explore the formation, types, and characteristics of igneous rocks with this comprehensive 7th-grade science worksheet.
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Igneous Rocks Exploration
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. Igneous rocks are formed from the cooling and solidification of what molten material?
Sediment
Magma or Lava
Metamorphic Rock
Organic matter
2. Which of the following is an example of an intrusive igneous rock?
Basalt
Obsidian
Granite
Pumice
3. Igneous rocks that form when magma cools slowly beneath the Earth's surface are called igneous rocks.
4. Igneous rocks that form when lava cools quickly on the Earth's surface are called igneous rocks.
5. The size of crystals in an igneous rock is determined by the at which the molten material cools.
6. All igneous rocks have visible crystals.
True
False
7. Extrusive igneous rocks generally have larger crystals than intrusive igneous rocks.
True
False
8. Describe the difference between magma and lava.
9. Explain why some igneous rocks are fine-grained and others are coarse-grained.
10. Look at the image below. Based on its appearance, would you classify this as an intrusive or extrusive igneous rock? Explain your reasoning.
