Chapter 1 CKLA Unit 5 Grade 4 Geology

Front

What did people in Europe during the Middle Ages believe about the earth's changes?

Back

The earth's surface has always remained the same.

Front

What did scientists discover about the ocean floor in the 1870s?

Back

It is made of basalt, a heavy rock.

Front

What was the name of the supercontinent proposed by Alfred Wegener?

Back

Pangaea

Front

Why did some scientists criticize Wegener's theory of continental drift?

Back

It didn't explain how the continents moved.

Front

What did geologists discover about the continents during the 1800s and early 1900s?

Back

The continents were once joined together.

Front

What is geology?

Back

Geology is the study of the Earth, its structure, and the processes that shape it.

Front

What is continental drift?

Back

Continental drift is the theory that continents move slowly over time across the Earth's surface.

Front

What is a supercontinent?

Back

A supercontinent is a large landmass that contains all or most of the Earth's continents.

Front

What is the ocean floor primarily made of?

Back

The ocean floor is primarily made of basalt, a heavy volcanic rock.

Front

What evidence supports the theory of continental drift?

Back

Fossil evidence, similar rock formations, and the fit of continents support the theory.