El ciclo de la roca: desgaste

The video explains how rocks on a beach become smooth and round due to the action of waves and friction over many years. It introduces the concept of weathering, which breaks down rocks and materials into smaller pieces through agents like water, ice, and chemicals. The Grand Canyon is used as an example of weathering over millions of years. Erosion is described as the process that transports these weathered materials to new locations, carried by forces such as water and wind.

What natural forces contribute to the smoothness of rocks on a beach?

• Gravity and magnetism

• Earthquakes and volcanoes

• Waves and friction

• Wind and sunlight

Which of the following is NOT an agent of weathering?

• Moving water

• Ice

• Sunlight

• Chemicals in rainwater

What is the primary role of the Colorado River in the Grand Canyon?

• It transports weathered materials

• It deposits new rocks

• It prevents erosion

• It creates new rock formations

How does erosion differ from weathering?

• Both processes involve transporting rocks

• Both processes involve breaking down rocks

• Weathering involves breaking down rocks, while erosion transports them

• Erosion involves breaking down rocks, while weathering transports them

What happens to rocks as they undergo weathering and erosion?

• They change color but stay the same size

• They break into smaller pieces and are carried away

• They become larger and more angular

• They remain unchanged