Project Test on Unit 2-4

Front

What is the primary composition of oceanic crust?

Back

Basalt.

Front

What is the average depth of the world's oceans?

Back

Approximately 3,682 meters (12,080 feet).

Front

What geological feature results from seafloor spreading along divergent plate boundaries?

Back

Oceanic ridges and rises.

Front

What does the lithosphere consist of?

Back

The lithosphere is composed of the crust and the uppermost portion of the mantle.

Front

What are convection currents in the ocean?

Back

Currents that result from the combination of surface currents and deep currents that move energy and matter throughout Earth's oceans.

Front

What type of rock primarily makes up the continental crust?

Back

Granite.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is primarily basalt and thinner, while continental crust is primarily granite and thicker.

Front

What is the significance of plate tectonics in oceanography?

Back

Plate tectonics explains the movement of the Earth's lithosphere, leading to the formation of oceanic features and influencing ocean currents.

Front

What are the three types of plate boundaries?

Back

Convergent, divergent, and transform plate boundaries.

Front

What is the role of the mantle in Earth's geology?

Back

The mantle is involved in tectonic processes and convection currents that drive plate movements.