4.7B Weathering

What is weathering?

• A process that breaks down rocks into smaller pieces.
• A shift in weather patterns.
• The process by which mountains are formed.
• The process by which the seasons change.

How might a weathered mountain appear different from an unweathered mountain?

• The weathered mountain would be taller
• The weathered mountain would appear rounder in shape.
• The weathered mountain would appear more jagged.
• The weathered mountain would contain fewer trees.

What can you infer about ice from the information presented in the movie?

• It usually causes chemical weathering.
• It expands as it freezes.
• It barely causes weathering at all.
• It does not exert pressure on rocks.

How is mechanical weathering different from chemical weathering?

• Chemical weathering happens over a much shorter time frame than mechanical weathering
• Chemical weatherin goccurs in the tropics; mechanical weathering occurs in temperate climates
• Chemical weathering occurs in mountains; mechanical weathering occurs on flat surfaces
• Chemical weathering changes the chemical composition of materials; mechanical weathering does not

What might cause mechanical weathering?

• acid rain
• violent earthquakes
• growing plants and expanding ice
• volcanic eruptions

What impact does weathering have on soil formation?

• Chemical weathering adds helpful chemicals to the soil
• Rocks are broken down into smaller pieces, and finally into sediment
• mechanical weathering adds ice to the soil, which turns into water
• Volcanic eruptions contribute metamorphic rocks to the soil

What types of rocks are formed by weathering?

• metamorphic rocks
• Igneous rocks
• Sedimentary rocks
• Volcanic rocks

How long does the weathering process take?

• A few days
• No more than a month
• Exactly one year
• years and years

Carbonic acid is a mixture of

• water and carbon dioxide
• calcite and quartz
• oxygen and hydrogen
• water and limestone

What process hollows out limestone caves?

• Mechanical weathering
• Chemical weathering
• Spatial weathering
• Cave weathering