Igneous Rocks

If an Igneous rock is dark-colored, what is the amount of silica?

• High

• Low

• Doesn't matter

Glassy textured rocks cool slowly

• True
• False

How is crystal size related to the rate a molten material cools

• The faster it cools the smaller the crystal

• The faster it cools the larger the crystal

• The slower it cools the smaller the crystal

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is NOT a way to describe a rocks texture

• Grain size

• Grain shape

• Grain pattern

• Grain composition

Which component of magma has the greatest influence on its characteristics?

• Oxygen

• Aluminum

• Silicon

• Iron

Tags

NGSS.HS-PS1-2

________________ magma has the highest silica content.

• Basaltic

• Andesitic

• Rhyolitic

• Pyroclastic

Tags

NGSS.MS-PS1-1

As pressure on a rock increases, how does its melting point change?

• increases

• decreases

• stays the same

As water content of a rock increases, how does the melting point change?

• Increases

• Decreases

• Stays the same

Tags

NGSS.MS-PS1-4

Some minerals have different melting points. Because of this, different parts of the rock will melt at different rates. This is know as what?

• Partial melting

• Flux melting

• Uneven melting

• Discontinuous melting

As magma cools and crystallizes, mineral crystals form in a predictable pattern known as the ________________

• Melting pattern

• Bowens reaction series

• Melting series

• Bowens melting pattern