Earth Space Exam #6

Front

What is the vent in a volcano?

Back

The opening of a volcano through which lava, ash, and gases are expelled.

Front

What is decompression melting?

Back

When a rock melts due to a decrease in pressure as it rises in the Earth's mantle.

Front

What provides the basic driving force for plate motions?

Back

Convection currents in the Earth's mantle.

Front

Which of the following is not a factor of magma formation?

Back

Density.

Front

What are the three layers of Earth?

Back

Crust, Mantle, Core.

Front

What is the crust?

Back

The outermost layer of the Earth, composed of solid rock.

Front

What is the mantle?

Back

The layer of the Earth between the crust and the core, composed of semi-solid rock.

Front

What is the core?

Back

The innermost layer of the Earth, consisting of a solid inner core and a liquid outer core.

Front

What is the role of heat in magma formation?

Back

Heat causes rocks to melt, forming magma.

Front

What is the significance of pressure in the Earth's interior?

Back

Increased pressure can prevent melting, while decreased pressure can lead to melting.