Unit 2 REVIEW

Front

What is the theory of continental drift?

Back

The theory that continents have moved over geological time and were once joined together in a single landmass.

Front

What evidence supports the theory of continental drift?

Back

Similar rock formations found on different continents.

Front

What are constructive forces in geology?

Back

Forces that build up landforms, such as mountains and valleys.

Front

How do weathering and erosion affect mountain ranges over time?

Back

They round the shapes of the rocks and change the features of the landscape.

Front

What geological feature is commonly formed at a divergent plate boundary?

Back

Mid-ocean ridge.

Front

What is the source of Earth's internal heat known as 'heat of formation'?

Back

The heat generated during the formation of the Earth.

Front

What is another source of Earth's internal heat?

Back

Radioactive decay.

Front

Why does the continental crust float on top of the mantle?

Back

Because the crust is less dense than the mantle.

Front

What is the mantle in geological terms?

Back

The layer of the Earth located between the crust and the core, composed of semi-solid rock.

Front

What is erosion?

Back

The process by which soil and rock are removed from the Earth's surface by natural processes.