Grade 4 Module 3 Twig

Front

What is erosion?

Back

Erosion is 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 are the main causes of erosion?

Back

The main causes of erosion include water, wind, ice (glaciers), and human activities.

Front

What is weathering?

Back

Weathering is the breaking down of rocks and minerals into smaller pieces by natural forces such as water, ice, and temperature changes.

Front

What is the difference between weathering and erosion?

Back

Weathering is the process of breaking down rocks, while erosion is the movement of those broken pieces from one place to another.

Front

What can cause weathering?

Back

Weathering can be caused by water, ice, temperature changes, and biological activity (like plants growing in cracks).

Front

What is sediment?

Back

Sediment is small pieces of rock, soil, and organic material that are transported by wind, water, or ice.

Front

What is the rock cycle?

Back

The rock cycle is the continuous process of rock formation, breakdown, and reformation through processes like erosion, sedimentation, and metamorphism.

Front

What is the oldest layer of rock in a sequence?

Back

The oldest layer of rock is usually found at the bottom of a sequence, as new layers are deposited on top.

Front

How do glaciers contribute to erosion?

Back

Glaciers contribute to erosion by moving slowly over land, scraping and carrying away rocks and soil.

Front

What is the significance of fossils in rock layers?

Back

Fossils found in rock layers can help scientists determine the relative age of the rocks and the environment in which the organisms lived.