Rocks & Weathering

Question 1

What are the types of weathering?

Answer 1

Physical
Biological
Chemical

Question 2

What is weathering?

Answer 2

Weathering is the breakdown of rocks into smaller fragments. This happens because of change sin the environment.

Question 3

What is freeze - thawing?

Answer 3

1. Water expands as ice and exerts force onto surrounding rocks
2. this happens over and over again
3. This creates cracks in the rock eventually
4. A fragment of rock will eventually fall off
   PHYSICAL

Question 4

What is exfoliation?

Answer 4

1. The sun heats surface of rocks, rock expands
2. night cools and rocks contract
3. Flakes fall off
   PHYSICAL

Question 5

What is biological weathering?

Answer 5

PLants grow in the cracks of a rock?

Question 6

What is slow chemical weathering?

Answer 6

Rainwater is naturally acidic, the weak acid slowly reacts with minerals in rock to wear it down.

Question 7

What is rapid chemical weathering?

Answer 7

Rainwater becomes more acidic because of burning of fossil fuels like sulphur and nitrogen. This reacts with minerals more rapidly.

Question 8

What is transportation?

Answer 8

Transportation is the movement of rock fragments from one place to another.

Question 9

What is deposition?

Answer 9

When weathered rock sinks to the bottom of a river to form sediment.