Answer the following questions. When you are finished click submit.

1. What is a magma and how does it differ from lava?

2. How does the rate of cooling influence crystal size?

3. How does the vesicular texture develop in igneous rocks?

4.How does pressure affect the melting of rocks?

5. What is magmatic differentiation and how does it affect the magma?

6. Granite and basalt are exposed at the surface in a hot, wet environment. Which type of weathering will predominate, chemical or mechanical? Which rock would weather most rapidly and why?

7.Why does chemical weathering proceed slowly in deserts?

8. An igneous rock is composed of Quartz, Mica, and Feldspar. Which components would you expect to weather most rapidly and why?

9. How does mechanical weathering add to the effectiveness of chemical weathering?

10. What is the difference between soil and regolith?