Weathering Quiz

Which of the following is NOT chemical weathering?

• Oxidation

• Hydrolysis

• Exfoliation

• Carbonation

Which of the following is chemical weathering?

• Ice-wedging

• Hydrolysis

• Exfolaitation

• Abrasion

How is mechanical weathering different from chemical weathering?

• Chemical weathering happens over much shorter time frame than mechanical weathering.
• Chemical weathering changes the chemical composition of rocks; mechanical weathering does not.
• Chemical weathering occurs only in tropical climates; mechanical weathering occurs only in cool climates.
• Chemical weathering occurs only in the mountains; mechanical weathering occurs only on flat land.

How do plants cause weathering?

• during photosynthesis they create a chemical reaction with rocks

• Roots grow into cracks and expand the rock

• Plants move water from their roots they cause the rock to break down

Carbonation is ...

• Sea water evaporating and leaving salt crystals to expand and exert pressure on cracks in rocks

• process of carbonic acid (H2CO3) in rain water reacting with calcium carbonate in limestone to form calcium bicarbonate.

• when the heat of the sun causes a rock to expand as it cools and contracts at night the rocks outer layer can crack (like an onion skin)

• When acid rain breaks down the rocks chemistry and causes it to rot

• when oxygen in water breaks down the rock

Exfoliation is ...

• Sea water evaporating and leaving salt crystals to expand and exert pressure on cracks in rocks

• process of carbonic acid (H2CO3) in rain water reacting with calcium carbonate in limestone to form calcium bicarbonate.

• when the heat of the sun causes a rock to expand as it cools and contracts at night the rocks outer layer can crack (like an onion skin)

• When acid rain breaks down the rocks chemistry and causes it to rot

• when oxygen in water breaks down the rock

Salt weathering is ...

• Sea water evaporating and leaving salt crystals to expand and exert pressure on cracks in rocks

• process of carbonic acid (H2CO3) in rain water reacting with calcium carbonate in limestone to form calcium bicarbonate.

• when the heat of the sun causes a rock to expand as it cools and contracts at night the rocks outer layer can crack (like an onion skin)

• When acid rain breaks down the rocks chemistry and causes it to rot

• when oxygen in water breaks down the rock

Hydrolysis is ...

• Sea water evaporating and leaving salt crystals to expand and exert pressure on cracks in rocks

• process of carbonic acid (H2CO3) in rain water reacting with calcium carbonate in limestone to form calcium bicarbonate.

• when the heat of the sun causes a rock to expand as it cools and contracts at night the rocks outer layer can crack (like an onion skin)

• When acid rain breaks down the rocks chemistry and causes it to rot

• when oxygen in water breaks down the rock

Oxidation is ...

• Sea water evaporating and leaving salt crystals to expand and exert pressure on cracks in rocks

• process of carbonic acid (H2CO3) in rain water reacting with calcium carbonate in limestone to form calcium bicarbonate.

• when the heat of the sun causes a rock to expand as it cools and contracts at night the rocks outer layer can crack (like an onion skin)

• When acid rain breaks down the rocks chemistry and causes it to rot

• when oxygen in water breaks down the rock

Freeze thaw weathering ....

• keeps the rocks in place

• makes the rocks last longer

• expands cracks and breaks rocks

• causes rocks to fall in landslides