Question

1. what turns the turbines in a hydroelectric power plant?

a. wind
b. heat from magma
c. moving water
d. solar radiation

1. which of the following is not a renewable energy source?

a. biomass
b. solar
c. wind
d. coal

1. biomass energy comes from:

a. rocks and minerals
b. organic materials like plants and manure
c. solar panels
d. wind turbines

1. which gas can be produced by bacteria decomposing biomass?

a. oxygen
b. carbon dioxide
c. methane
d. hydrogen

1. wind energy is not a dependable source in all locations because:

a. wind farms are too expensive
b. the wind does not always blow
c. it produces pollution
d. it requires fossil fuels

1. which country heats about 85% of its homes with geothermal energy?

a. canada
b. iceland
c. japan
d. germany

Explanation:

• Question 5: In a hydroelectric power plant, moving water (from a dam, for example) is used to turn turbines. Wind is used in wind - powered plants, heat from magma in geothermal plants, and solar radiation in solar - powered plants.
• Question 6: Renewable energy sources can be replenished naturally. Biomass (from organic matter), solar, and wind are renewable. Coal is a fossil fuel and is non - renewable.
• Question 7: Biomass energy comes from organic materials. Rocks and minerals are not organic. Solar panels convert solar energy, and wind turbines convert wind energy.
• Question 8: When bacteria decompose biomass in an anaerobic (oxygen - free) environment, methane is produced. Oxygen is not typically a product of this decomposition in the context of energy - related biomass decomposition. Carbon dioxide can be produced in some aerobic biomass decomposition, but methane is more characteristic of anaerobic biomass decomposition for energy (like in biogas). Hydrogen is not a common product of simple bacterial biomass decomposition for energy.
• Question 9: Wind energy depends on the wind blowing. If there is no wind, the turbines do not generate electricity. Wind farms' cost is a different issue (not about dependability in terms of energy availability), wind energy is relatively clean (does not produce much pollution compared to fossil fuels), and it does not require fossil fuels.
• Question 10: Iceland is known for its extensive use of geothermal energy for heating. Canada, Japan, and Germany do not have such a high percentage of homes heated by geothermal energy.

Answer:

1. c. Moving water
2. d. Coal
3. b. Organic materials like plants and manure
4. c. Methane
5. b. The wind does not always blow
6. b. Iceland