4th Grade CKLA Unit 5 Review

Front

What is a 'hypothesis'?

Back

An idea that has been suggested and may be true but has not yet been proven.

Front

What causes the Earth's plates to be in constant motion?

Back

Heat.

Front

How is igneous rock formed?

Back

Igneous rock is formed by lava cooling down and becoming solid.

Front

What mostly makes up the Earth's crust and mantle?

Back

Rocky material.

Front

In what type of area would weathering and erosion have the greatest impact?

Back

Bare soil.

Front

What is weathering?

Back

The process of breaking down rocks into smaller pieces.

Front

What is erosion?

Back

The movement of weathered material from one place to another.

Front

What is the Earth's crust?

Back

The outermost layer of the Earth, made mostly of rocky material.

Front

What is the mantle?

Back

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

Front

What is igneous rock?

Back

Rock formed from cooled lava or magma.