What is the process called when rocks break down into sediment at or near the Earth's surface?

• Weathering

• Erosion

• Sedimentation

• Metamorphism

Which of the following is an example of mechanical weathering?

• Bacteria breaking down minerals

• Tree roots splitting rocks

• Frost wedging

• Acid rain dissolving rock

What happens to water in a rock crack during frost wedging?

• It evaporates

• It contracts

• It remains unchanged

• It expands

How does acid rain affect rocks?

• It polishes them

• It discolors and dissolves them

• It makes them harder

• It has no effect

Which organisms can contribute to biological weathering?

• Only plants

• Only fungi

• Only animals

• Plants, animals, bacteria, and fungi