Earth History 4.85 Igneous rock / Earth Layers

Front

What is the core of the Earth?

Back

The core is the innermost layer of the Earth, consisting of a solid inner part and a liquid outer part.

Front

What are igneous rocks?

Back

Igneous rocks are formed from the cooling and solidification of magma or lava.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive igneous rocks form from magma that cools slowly beneath the Earth's surface, resulting in larger crystals, while extrusive igneous rocks form from lava that cools quickly on the surface, resulting in smaller crystals.

Front

What does it mean if an igneous rock has no crystal grains?

Back

It indicates that the rock was formed from lava that cooled off quickly.

Front

What is the mantle?

Back

The mantle is a layer of the Earth located beneath the crust, composed of semi-solid rock that can flow slowly.

Front

What is magma?

Back

Magma is molten rock located beneath the Earth's surface, which can form igneous rocks when it cools.

Front

What is the thinnest layer of the Earth?

Back

The crust is the thinnest layer of the Earth.

Front

How do igneous rocks form?

Back

Igneous rocks form when magma or lava cools and solidifies.

Front

What is the relationship between the mantle and magma?

Back

The mantle is a layer of Earth underneath the crust, and magma is the melted rock found within the mantle.

Front

What type of igneous rock would you expect to see if it is intrusive?

Back

You would expect to see a rock with larger crystal grains.