1. What is igneous rock?

• Igneous rock is a type of rock formed from the cooling and solidification of magma or lava.
• A type of rock that forms only underwater.
• Metamorphic rock created by heat and pressure.
• Sedimentary rock formed from compressed sediments.

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NGSS.MS-ESS2-1

1. What is the primary process involved in the formation of igneous rocks?

• Cooling and solidification of magma or lava.

• Compaction and cementation of sediments.

• Metamorphism due to heat and pressure.

• Erosion and sedimentation.

3. What is extrusive rock?

• Extrusive rock is a type of igneous rock that forms from lava that cools quickly on the Earth's surface.
• Extrusive rock created by the alteration of existing rocks under heat and pressure.

• A type of sedimentary rock formed from compressed organic materials.
• Extrusive rock that forms deep underground from slowly cooled magma.

Why do large crystals form in intrusive rock?

• Large crystals develop from sedimentary processes.
• Large crystals are formed by volcanic eruptions.
• Large crystals form in intrusive rock due to slow cooling of magma.
• Large crystals form due to rapid cooling of lava.

Which type of rock is formed from the solidification of magma or lava?

• igneous

• sedimentary

• metamorphic

• bioclastic

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NGSS.MS-ESS2-2

5. What three factors determine the type of igneous that forms?

• Type of rock formation, mineral hardness, pressure conditions
• Composition of magma, temperature of solidification, rate of cooling
• Presence of water, wind speed, geological age
• Color of the rock, size of crystals, location of formation

7. Where does extrusive rock form?

• Extrusive rock forms underground.
• Extrusive rock forms in the mantle.
• Extrusive rock forms in water.
• Extrusive rock forms on the Earth's surface.

8. At what rate does extrusive rock cool?

• Extrusive rock cools rapidly.
• Extrusive rock cools underground.
• Extrusive rock cools at a moderate rate.
• Extrusive rock cools slowly.

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NGSS.MS-PS1-4

9. 9. Why don't crystals always form in extrusive rock?

• Crystals are always present in all types of rock.
• Extrusive rock is formed from sedimentary processes.
• Crystals form due to slow cooling in extrusive rock.
• Crystals do not form in extrusive rock due to rapid cooling.

10. 10. What happens to the gas in gas-rich lava as it erupts?

• The gas expands and can cause explosive eruptions. It escapes.

• The gas cools down and solidifies immediately.
• The gas remains trapped and does not escape.
• The gas condenses into liquid droplets.