Volcanoes 4.4

What is Earth's crust broken into?

• egg shells

• pans

• plates

• shields

How does a volcano form?

• when ice from glaciers build up

• when rocks build up around a mountain

• when lava pushes up through an existing mountain

• when a lot of lava flows out at one spot and forms a mountain

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Volcanoes swell when...

• air builds up inside it.

• there is too much rain.

• magma pushes up inside it.

• lava shoots out and falls back inside it.

How can volcanic ash help the environment?

• It can be recycled.

• The wind carries ash.

• Animals can eat the minerals in it.

• Minerals in the ash can help plants grow.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What two types of volcanoes did you read about in the text?

• shield-shaped

• porcupine-shaped

• cone-shaped

• box-shaped

• dinosaur-shaped