Understanding Freeze-Thaw Weathering

What is another name for freeze-thaw weathering?

• Biological weathering

• Frost weathering

• Thermal expansion

• Chemical weathering

What happens to water during the freeze-thaw cycle that causes rocks to break?

• It dissolves

• It evaporates

• It contracts

• It expands

How does the freeze-thaw cycle affect a large boulder over time?

• It polishes the surface

• It causes cracks to form and widen

• It creates a smooth surface

• It causes the boulder to melt

What is observed in the moraine deposits in southeast Iceland?

• A smooth boulder

• A boulder with no visible changes

• A boulder with a large crack and weathered fragments

• A boulder covered in moss

Which type of rock is more affected by freeze-thaw processes?

• Stronger, more resistant rocks

• Rocks found in deserts

• Weaker, more friable rocks

• Rocks with high metal content