Weathering and Erosion Concepts

The video explores how weathering and erosion reshape Earth's surface. It covers physical and chemical weathering, detailing how temperature changes, ice, plants, and animals contribute to rock breakdown. Chemical weathering involves acid rain and oxygen altering minerals. Erosion, driven by wind, water, ice, and gravity, moves sediments, forming new landscapes. Glaciers play a significant role in shaping terrain. Over time, these processes create features like canyons and reduce mountain heights, illustrating Earth's dynamic nature.

What are the two main processes that continually reshape Earth's surface?

• Volcanic eruptions and earthquakes

• Tectonic plate movements and landslides

• Weathering and erosion

• Flooding and drought

Which of the following is an example of physical weathering?

• Rust forming on iron-rich rocks

• Tree roots breaking rocks apart

• Acid rain dissolving limestone

• Moss releasing acids on rock surfaces

How does ice contribute to physical weathering?

• By providing a surface for moss to grow

• By expanding in cracks and breaking rocks apart

• By melting and washing away sediments

• By reacting with minerals to form new compounds

What is the primary cause of chemical weathering?

• Wind carrying sediments

• Chemical reactions with minerals

• Temperature fluctuations

• Water freezing and thawing

Which gas in the air contributes to chemical weathering by reacting with iron-containing minerals?

• Methane

• Carbon dioxide

• Nitrogen

• Oxygen

What is erosion primarily responsible for?

• Breaking down rocks into smaller pieces

• Transporting sediments to new locations

• Creating new mountain ranges

• Forming new minerals in rocks

How do glaciers contribute to erosion?

• By melting and forming rivers

• By grinding against rocks and carrying sediments

• By creating sand dunes

• By causing landslides

What geological feature was formed by the Colorado River through weathering and erosion?

• The Sahara Desert

• Mount Everest

• The Grand Canyon

• The Great Barrier Reef

What has happened to the Appalachian Mountains over millions of years due to weathering and erosion?

• They have grown taller

• They have been completely eroded away

• They have been worn down significantly

• They have remained unchanged

What is the eventual fate of Earth's tallest peaks due to weathering and erosion?

• They will continue to grow taller

• They will be submerged underwater

• They will be replaced by new mountains

• They will remain the same height