Volcanoes

—What is magma?

• molten rock under the ground

• molten rock on the surface of the earth

• molten rock on the moon

Tags

NGSS.MS-ESS2-1

Remember the melting point range of most rock?

• 800°C to 1200°C

• 1,000,000 °C to 2,000,000°C

• 20°C to 100°C

Tags

NGSS.MS-PS1-4

Magma that is made up of Basalt with a low (50%) silica content.

• Basaltic

• Andesitic

• Rhyolitic

What is Viscosity ?

• internal resistance to flow

• how dense something is compared to another substance

• the type of magma

Tags

NGSS.MS-PS1-4

The temperature and composition of the magma determines the viscosity of magma.

• True

• False

Tags

NGSS.MS-PS1-4

This volcano is a mountain with broad gently sloping sides and a nearly circular base.

• shield

• composite

• cinder cone

The Hawaiian Islands - Kilauea is an example of a

• Shield volcano

• cinder cone volcano

• Composite volcano

These volcanoes are steep sided and generally small

(less than 500 meters high). They are formed when material ejected high into the air falls back to Earth and piles up around the vent.

• Cinder cone

• Shield

• Composite or Strato

—An example of this type of volcano is Paricutin in Mexico

• cinder cone

• strato or composite

• shield

These are larger than other volcanoes and their slopes are not as steep. They are formed when layers of volcanic fragments alternate with lava flows.

• composite or strato

• cinder cone

• shield