IGNEOUS ROCKS

Igneous rocks form when magma cools and turns to solid rock.

• Yes

• No

Sometimes igneous rocks form when magma cools underground. When that happens, the magma cools more slowly. There is more time for crystals to form.

• True

• False

Igneous rocks that form under ground have large crystals that can be easily seen. Granite is an igneous rock that forms from magma.

• Yes

• No

Most mountains are made of granite.

• That is right

• Not true

When magma reaches the surface of the Earth, it forms lava. Lava is what flows from a volcano when it erupts.

• No

• Yes

Obsidian is an igneous rock that forms from lava. It has glass-like features.

• Yes

• No

Pumice forms from lava filled with lots of gases. It is like a sponge and is the only rock that floats.

• Yes

• No

Another rock that forms from lava is basalt

• No

• Yes

●What are igneous rocks?

Igneous rocks are rocks that form when molten rocks cool and turn to solid rock.

• That's right

• Not true

What are examples of igneous rocks?

• Obsidian

  Basalt

  Granite

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