What mineral is the softest mineral on Moh's Hardness Scale and the main ingredient in baby powder?

• feldspar
• talc
• gypsum
• kaolinite

The remains of living things that died long ago are often found in what type of rock?

• igneous rocks

• sedimentary rock

• metamorphic rock

• all rocks

The cooled and hardened magma from volcanoes form what rocks?

• igneous

• sedimentary

• metamorphic

• fossils

Rocks that are buried deep in the earth can be changed into an entirely new rock when it goes through what?

• weathering and erosion

• pressing and cementing

• heat and pressure

• cooling and hardening

This rock was formed by smaller pieces of rock that settled at the bottom of a lake millions of years ago. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic

According to the law of superposition, which layer is the youngest?

• A
• B
• C

An example of BIOsphere connecting to ATMOsphere

• plants produce oxygen
• animals eat plants
• animals live in caves
• animals drink water

5. Scientists knowledge of the Earth's interior has come primarily from...

• a. studying magnetic reversals in oceanic crust
• b. using a system of satellite called the giobal positioning system
• c. studying sesmic waves generated by earthquakes.
• d. studying the pattern of fossils on different continents.

How are weathering and erosion related?

• Both weathering and erosion break down soil. 
• Both weathering and erosion move rocks.
• Weathering breaks down rocks, and then erosion moves the broken down rocks.
• They are not related at all.

Which layer is the oldest? 

• c
• a
• b
• d