Help me on geography?

1. How does the depth of weathering relates to temperature and precipitation?

2. Explain how the properties of either granite or limestone affect the operation of physical and chemical weathering processes?

3. Explain the factors and processes that are more effective in the weathering of granite and limestone?

Thank you im advance! I've got an idea on how to answer some of these questions however I don't know how to put in in words and I feel like something is missing in my answers. Please help!!