7th Unit 3 Review

Front

A rift valley occurs at a ____________ boundary.

Back

divergent

Front

What evidence from fossils supports the idea that the continents were once joined and then drifted apart?

Back

Fossils from plants and animals are found on two different continents.

Front

Oceanic crust is _____ than continental crust.

Back

denser

Front

What type of boundary is shown at A?

Back

divergent

Front

Convection currents occur in which layer of Earth?

Back

Middle mantle.

Front

What is a divergent boundary?

Back

A tectonic plate boundary where two plates move away from each other.

Front

What is the significance of Pangea in geology?

Back

Pangea was a supercontinent that existed millions of years ago, illustrating the concept of continental drift.

Front

What are convection currents?

Back

Movement of fluid caused by differences in temperature and density, driving plate tectonics.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is denser and thinner than continental crust.

Front

What type of geological activity occurs at convergent boundaries?

Back

Subduction, mountain building, and earthquakes.