Chapter 10 STUDY

Occurs when rock rises and melts due to reduced pressure.

• decompression melting

• hot spot

• intraplate volcanism

• Ring of Fire

All volcanoes form along divergent and convergent plate boundaries.

• true

• false

Decreasing pressure causes rocks to melt at lower temperatures.

• true

• false

Kilauea (Hawaii) and Yellowstone (Wyoming) are examples of volcanoes that occur at divergent plate boundaries.

• true

• false

In intraplate volcanism, a plume of hot magma creates a volcanic region in the middle of a plate called a _____.

The long belt of volcanoes that circles much of the Pacific Ocean.

• the Ring of Fire

• the Ruling Ring

• the Pacific Ring

• the Volcano Ring

Increasing water content of rock lowers the rock's melting temperature.

• true

• false

The formation of magma depends on several factors including heat, pressure, and water content.

• true

• false

A substance's resistance to flow.

Two factors that determine magma's viscosity are

• temperature and chemical composition

• depth and temperature

• geographic location and depth

• type of volcano and depth