Figure 4.8: James Hutton is considered the “Father of Geology.” ( 6 )Review Questions
- Describe the difference between a rock and a mineral.
- Why can the minerals in a rock be a clue about how the rock formed?
- What is the difference between magma and lava?
- What are the 3 main types of rocks and how does each form?
- Describe how an igneous rock can change to a metamorphic rock.
- Explain how sediments form.
- In which rock type do you think fossils, which are the remains of past living organisms,
are most often found? - Suppose that the interior of the Earth was no longer hot, but all other processes on
Earth continued unchanged. How would this affect the distribution of rocks formed on
Earth?
Vocabulary
chemical composition Description of the elements or compounds that make up a sub-
stance and how those elements are arranged in the substance.
deposited Put down or dropped by water or wind onto the ground.
lava Molten rock at the surface of Earth.