ES Unit 7 Earth’s Changing Surface, lesson 1: Surface Processes

Front

What are the two ultimate sources of energy that drive the erosion of Earth’s surface?

Back

The sun and gravity.

Front

What are ice, plants and animals, gravity, running water, and wind common agents of?

Back

Mechanical weathering.

Front

What particles drop out first as wind or water movement slows down?

Back

The largest particles.

Front

What is the main driving force in rock fragments moving downhill?

Back

Gravity.

Front

What are horizons?

Back

Layers of soil that have developed over time.

Front

What is erosion?

Back

The process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water flow.

Front

What is weathering?

Back

The breaking down of rocks and minerals into smaller pieces by physical, chemical, or biological processes.

Front

What is the difference between mechanical and chemical weathering?

Back

Mechanical weathering involves the physical breakdown of rocks, while chemical weathering involves changes in the chemical composition of minerals.

Front

What role does gravity play in erosion?

Back

Gravity pulls materials downhill, contributing to the movement of soil and rock.

Front

What is sediment?

Back

Small particles of rock and soil that are transported by wind, water, or ice.