Factors affecting weathering

Q. When rocks are exposed to intense heat, which of the following layers start to contract the fastest?

1. Outer layers
2. Inner layers
3. Layers don't contract
4. None of the above

Q. Do plants also play a role in the rocks' weathering process?

1. No
2. Yes
3. Can't say
4. None of the above.

Q. When water freezes in rocks, it _________. Choose the correct sentence(s) for water and rock.

1. shrinks
2. turns to frost or ice
3. evaporates
4. expands

Q. Weathering is caused by which of the following factors?

1. Temperature
2. Frost
3. Plants
4. Humidity