Unit 7 Human Impact 2

1. ___________________ is made from the remains of decaying plant and animal remains.

• organic material
• inorganic material
• litter
• bedrock

2. Soil is a mixture of....... (choose all that apply)

• organic material
• Weathered rock particles, sediment
• air
• water

3. The first step in the process of forming soil is

• the weathering of rock into sediment
• bacteria decomposing organic material
• formation of humus

4. Which soil conservation method helps prevent soil erosion?

• laying ground cover such as mulch or straw
• planting wind breaks (trees) around a flat, open field
• conservation plowing- leaving harvested crop on the ground
• all of these

5. Which of the following is a renewable resource _____

• coal
• oil
• sun
• natural gas

6. Using the heat from the Earth's interior to generate electricity is which form of renewable energy?

• biomass
• geothermal
• nuclear
• hydroelectricity

7. _______ power is generated from the heat released when uranium atoms split (fission).

• biomass
• solar
• nuclear
• geothermal

8. Which source/s are considered nonrenewable? Choose all that apply

• Fossil Fuels
• Nuclear
• coal
• petroleum/oil
• Hydroelectricity

9. Which description BEST explains a NONrenewable resource?

• A resource that pollutes the environment
• A resource that is clean
• A resource that cannot be replaced in the amount of time that it is used.
• A resource that can be replaced in the amount of time that it take to use it.

10. List the soil layers in order starting from the surface.

• organic material, topsoil, subsoil, weathered bedrock, bedrock
• organic material, subsoil, topsoil, bedrock, weathered bedrock
• topsoil, organic material, subsoil, bedrock, weathered bedrock
• topsoil, organic material, subsoil, weathered bedrock, bedrock