Unit 2.1 Review

Front

What is a cast in geology?

Back

A cast is a type of fossil that forms when sediments fill in a cavity left by a decayed object, creating a replica of the original shape.

Front

What layer of the Earth is made mostly of liquid iron and nickel?

Back

The outer core is the layer of the Earth that is composed mostly of liquid iron and nickel.

Front

What are the two layers that make up the Earth's core?

Back

The Earth's core is made up of the inner core and the outer core.

Front

What is frost wedging?

Back

Frost wedging is a geological process that occurs when water repeatedly freezes and thaws, causing rocks to break apart.

Front

What are the two types of crust on Earth?

Back

The two types of crust are continental crust and oceanic crust.

Front

Define the term 'lithosphere'.

Back

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

Front

What is the asthenosphere?

Back

The asthenosphere is the semi-fluid layer of the mantle located beneath the lithosphere, allowing for tectonic plate movement.

Front

Explain the process of erosion.

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind, water, and ice.

Front

What is the difference between continental and oceanic crust?

Back

Continental crust is thicker and less dense than oceanic crust, which is thinner and denser.

Front

What is the significance of the outer core?

Back

The outer core is significant because it generates the Earth's magnetic field through the movement of liquid iron and nickel.