Front

What is a surface expression of a plume of magma rising from a stationary source of heat in the mantle called?

Back

Hot spot

Front

What is accretion?

Back

The process of growth or increase by the gradual accumulation of additional layers or matter.

Front

When was the United States Exploring Expedition launched?

Back

1840

Front

What does density stratification refer to?

Back

The separation of substances based on density.

Front

How is density defined?

Back

Density is defined as the mass of an object divided by its volume.

Front

What is a mantle plume?

Back

A mantle plume is an upwelling of hot rock from the Earth's mantle that can cause volcanic activity.

Front

What is the lithosphere?

Back

The lithosphere is the rigid outer layer of the Earth, consisting of the crust and upper mantle.

Front

What is isostasy?

Back

Isostasy is the state of gravitational equilibrium between the Earth's crust and mantle.

Front

What is the process of photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is evaporation?

Back

Evaporation is the process by which water changes from a liquid to a gas.