ALTERNATE ENERGY SOURCES. 1. Which of the following natural resources is correctly paired with its extraction method? A.natural gas → hydrofracking B.peat.

ALTERNATE ENERGY SOURCES

1. Which of the following natural resources is correctly paired with its extraction method?

A. natural gas → hydrofracking

B. peat → surface mining

C. coal → harvesting

D. wood → drilling

2. Which is a farming technique that could improve the soil and the environment?

A. using fueled machines that will turn the soil continuously

B. creating undisturbed layers of mulch in the soil

C. placing inorganic chemical fertilizers in the soil

D. irrigating the soil with salty water

STARTER

ALTERNATIVE ENERGY • Scientists have developed energy resources that are an alternate to fossil fuels. Reduce gas

emissions but are NOT sustainable

• Solar Energy

• Wind Energy

• Hydroelectric Energy

• Geothermal Energy

• Nuclear Energy

• Biofuels

SOLAR ENERGY

• Solar Energy uses photovoltaic (PV) panels to convert sunlight into electricity

• Used in mountainous areas, open areas like deserts

• North Carolina Solar House at NC State• House is run entirely off of solar energy

SOLAR ENERGY

• Advantages

• Produces no pollution

• Very quiet

• Disadvantages:

• Initial cost of solar panels is expensive

• Only work during daylight hours.

NUCLEAR ENERGY

• In nuclear fission, uranium/plutonium nuclei split into smaller nuclei and emit neutrons and heat energy • North Carolina State Nuclear Plant

NORTH CAROLINA STATE UNIVERSITY NUCLEAR PLANT

NUCLEAR ENERGY• Advantages:

• Create very small amounts of pollution

• Very reliable

• Disadvantages:

• Radioactive waste (must be monitored for 10,000 years after it is used

• Threat of nuclear terrorism/Meltdown

WIND ENERGY

• Using the energy of wind to power a turbine• Done in coastal areas

• Advantages• Self-sustaining • Does not impact ecosystems

• Disadvantages: • Not 100% reliable • High initial cost• Takes up a large amount of land

MODERN VERTICAL WIND TURBINE

WIND IN NORTH CAROLINA

HYDROELECTRIC POWER

• Hydroelectric power is the power generated by falling water.

• Water flows through a dam and turns a turbine

• Advantages:

• No fossil fuels

• Very few breakdowns

• Disadvantages:

• Disrupts natural ecosystems

• Expensive to build

• Geothermal Energy takes heat from Earth’s interior• Heat within the Earth raises the

temperature of groundwater• Water is converted to steam

• Can only be done near plate boundaries

GEOTHERMAL ENERGY

BIOFUELS• Biofuels are energy resources that come from living organisms.

• Bioethanol

• Biodiesel

• Biomass – Material left over from a once living plant or animal

BIOFUELS• Advantages:

• Less expensive than gasoline

• Carbon Emissions are less than gasoline

• Are more quickly renewed than gasoline

• Disadvantages:

• Have lower energy output