Weathering and Its Effects

What are the mechanical and chemical processes that change objects on Earth's surface over time called?

• Erosion

• Weathering

• Deposition

• Sedimentation

Which type of weathering breaks rocks into smaller pieces without changing their chemical makeup?

• Mechanical weathering

• Chemical weathering

• Both mechanical and chemical weathering

• None of the above

What is another name for ice wedging?

• Frost wedging

• Rock wedging

• Water wedging

• Ice cracking

What process grinds away rock by friction or impact?

• Ice wedging

• Abrasion

• Plant growth

• Animal activity

How do plants contribute to mechanical weathering?

• By dissolving rocks

• By creating holes in the soil

• By grinding rocks through friction

• By pushing on the sides of cracks in rocks

What is the result of mechanical weathering?

• Sand and clay

• Sediment

• Smaller pieces of rock

• Chemically altered rock

Which of the following has the largest surface area?

• Sand

• Silt

• Clay

• Granite

What is the main factor that determines the effect of weathering on soil particles?

• Size of the particles

• Chemical composition of the particles

• Amount of water present

• Temperature of the environment

What is the process called when materials that are part of a rock are changed into new materials?

• Mechanical weathering

• Chemical weathering

• Erosion

• Deposition

Why is water important in chemical weathering?

• Water dissolves rocks

• Water causes mechanical weathering

• Water increases the temperature of rocks

• Water prevents weathering