Unit 2 Review: Geological Processes

Front

What is the outer core of the Earth?

Back

The outer core is a liquid layer composed mainly of iron and nickel, located beneath the mantle and above the inner core.

Front

How many lithospheric plates make up Earth's surface?

Back

Approximately 70 to 80 lithospheric plates make up Earth's surface.

Front

What are the three main layers of the Earth?

Back

The three main layers of the Earth are the crust, mantle, and core (which includes the outer core and inner core).

Front

What is Pangea?

Back

Pangea was a supercontinent that existed hundreds of millions of years ago, which eventually split apart to form the continents we know today.

Front

Where do most earthquakes and volcanoes occur?

Back

Most earthquakes and volcanoes occur along the coasts and at the boundaries of tectonic plates.

Front

What is the lithosphere?

Back

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

Front

What is continental drift?

Back

Continental drift is the theory that continents have moved over geological time and were once joined together as a single landmass.

Front

What is the mantle?

Back

The mantle is the thick layer of the Earth located between the crust and the outer core, composed of semi-solid rock that flows slowly.

Front

What is the inner core?

Back

The inner core is the solid, innermost layer of the Earth, composed mainly of iron and nickel, and is extremely hot.

Front

What is the difference between oceanic and continental crust?

Back

Oceanic crust is thinner and denser than continental crust, which is thicker and less dense.