Lithosphere- Geological Time & Rock Types

Question 1

What are the three different types of rocks?

Answer 1

Sedimentary, igneous and metamorphic

Question 2

How does a rock weather- freeze thaw

Answer 2

Starts with a crack, water enters crack and expands it, crack deepens- more water enters and freezes, repeated freeze and thaw breaks up rock along the joint lines

Question 3

What are all the different types of weathering?

Answer 3

Physical weathering- freeze thaw, chemical weathering carbonation (acid rain) and biological weathering

Question 4

How does chemical weathering carbonation (acid rain) work?

Answer 4

Hard rock with regolith ( softer unconsolidated rock), rain water with carbonic acid will react with revolts and break it down and wreathing regolith leaves rocky bits standing on its own.

Question 5

How does biological weathering work?

Answer 5

Roots of plants enlarge cracks and joints in rocks and as the root grows the joint is opened up.