8.1 What is Weathering?

What is weathering?

• The process of rocks being formed

• The process of rocks breaking down

• The process of water freezing

• The process of plants growing

Which type of weathering is caused by the action of plants and animals?

• Chemical weathering

• Freeze-thaw weathering

• Onion-skin weathering

• Biological weathering

What happens during freeze-thaw weathering?

• Rocks expand and contract due to temperature changes

• Water enters cracks in rocks, freezes, and causes the cracks to widen

• Plants grow in cracks and break the rocks apart

• Rainwater reacts with minerals in the rocks

Which type of weathering is common in desert areas where it is very hot during the day but cool at night?

• Freeze-thaw weathering

• Onion-skin weathering

• Chemical weathering

• Biological weathering

What is the main cause of chemical weathering?

• The action of plants and animals

• The action of water

• The action of wind

• The action of ice

Which of the following is NOT a type of weathering mentioned in the text?

• Freeze-thaw weathering

• Onion-skin weathering

• Biological weathering

• Thermal weathering