Unit 4 Lesson 3 Part I

Front

What happens to soft, hot rock during convection?

Back

It becomes less dense and rises or floats.

Front

What causes convection currents in the Earth?

Back

The uneven heating on each layer inside the Earth.

Front

What is convection?

Back

Convection is the process by which heat is transferred through fluids (liquids and gases) by the movement of the fluid itself.

Front

What happens to soft, cool rock during convection?

Back

It becomes more dense and sinks or falls.

Front

What evidence supports the theory of plate tectonics?

Back

The discovery that rocks from different locations, like the Franklin Mountains and eastern Antarctica, are the same age and have the same chemical and geological properties.

Front

Define magma.

Back

Magma is molten rock located beneath the Earth's surface.

Front

Define lava.

Back

Lava is molten rock that has erupted onto the Earth's surface.

Front

What is the upper mantle?

Back

The upper mantle is the layer of the Earth located between the crust and the lower mantle, composed of solid rock that can flow slowly.

Front

What is the role of density in convection?

Back

Density differences in fluids cause warmer, less dense material to rise and cooler, denser material to sink.

Front

What is the significance of uneven heating in the Earth's layers?

Back

Uneven heating leads to convection currents, which drive the movement of tectonic plates.