Weathering and Erosion Processes

The video explains the process of weathering, which breaks down rocks into smaller pieces over time. It identifies water, ice, wind, plants, and temperature changes as key agents of weathering. Water can cause both physical and chemical changes in rocks, while plants and wind contribute by expanding cracks and eroding surfaces. Temperature fluctuations lead to expansion and contraction, further breaking down rocks.

What is the process called that breaks down rocks into smaller pieces over time?

• Deposition

• Sedimentation

• Weathering

• Erosion

Which of the following is NOT an agent of weathering?

• Wind

• Fire

• Ice

• Water

How does water cause physical weathering in rocks?

• By dissolving minerals

• By compressing the rock

• By heating the rock

• By expanding when it freezes

What happens to a rock when water causes a chemical change?

• It melts

• It changes color

• It dissolves some materials

• It becomes harder

How do plants contribute to the weathering of rocks?

• By providing shade

• By producing oxygen

• By growing roots in cracks

• By absorbing water

What is the effect of wind carrying sand on rock surfaces?

• It erodes the surface

• It smoothens the surface

• It strengthens the surface

• It polishes the surface

What tool is similar to the natural process of wind erosion?

• A hammer

• A paintbrush

• A sand blaster

• A drill

How do temperature changes cause weathering in rocks?

• By melting the rock

• By causing expansion and contraction

• By freezing the rock

• By drying the rock

What happens to materials in rocks when they expand and contract at different speeds?

• They become smoother

• They break down

• They fuse together

• They change color

Which of the following is a result of temperature-induced weathering over time?

• Gradual rock breakdown

• Immediate rock collapse

• Rock hardening

• Rock color change