Igneous Rocks

What type of crystals are formed when igneous rock cools very slowly underground?

• Fine-grained

• Coarse-grained

• Medium-grained

• No crystals

Fill in the blank: When igneous rock is formed at the surface, the process is much faster and results in _______ crystals.

• smaller

• larger

• medium-sized

• giant

What is the process called when intrusive rock is exposed at Earth's surface?

• Erosion

• Uplift

• Weathering

• Sedimentation

Fill in the blank: Igneous rocks are weathered by wind, water, and _______.

• ice

• fire

• sunlight

• gravity

What are igneous rocks formed from?

Intrusive igneous rock forms when magma pushes into rock below Earth's surface and ________.

• solidifies

• evaporates

• melts completely

• turns into gas

Extrusive igneous rock forms when lava reaches Earth's surface and ________.

• cools quickly

• remains molten

• sinks into the ground

• evaporates