Non-renewable & Renewable Resources

What is fuel? A fuel is a substance that provides a form of energy. Energy can be in the form of heat, light, electricity, or motion. When fuel is burned it releases energy: this is called combustion.

Fossil fuels Three Fossil Fuels: Coal Oil (petroleum) Natural Gas What is a fossil? Fossil fuels are the energy-rich substances formed from the remains of once living organisms. Three Fossil Fuels: Coal Oil (petroleum) Natural Gas

Nonrenewable resources Fossil fuels are non-renewable – they are being used up faster than they are made. They take a long time to form and could run out. What are the three fossil fuels? Coal Oil Natural Gas Quick Review!

Alternative Energy Resources We need to find alternative energy resources so that we do not use up all of our nonrenewable resources

Renewable Resources A renewable resource is constantly being supplied. What are some renewable resources?

Solar Energy Solar energy – light and heat energy from the sun Solar energy is the source for wind and water energy. How? Wind – unequal heating of the Earth causes global winds Water – sun heats water for evaporation to start the water cycle

Wind Can be used to cause turbines to move and generate electricity The least reliable because of weather

Hydroelectric Power Flowing water causes the turbines to move and generate electricity. 2. The most common and most used.

Biomass fuels Biomass fuels are made from organic materials. Examples include: Wood Leaves Food wastes Manure

Geothermal Energy Heat energy from underground. Magma heats up water underground

Protect our Resources You have two minutes. Brainstorm some ways we can conserve our nonrenewable resources.

Energy Conservation Conservation means to save energy. Two ways to avoid fuel shortage: Find new sources of energy Make fuels available last as long as possible

Ways to conserve: Walk or ride bike instead of drive Put on sweater instead of turning on heat Use fans instead of air conditioning Use sunlight instead of electric lights Turn off lights or TV when you leave the room Recycle!

Summarize What are the three fossil fuels and name at least one and how it is used. Explain how an alternative energy source can be used in place of… What do we call energy from the sun?

POLLUTION

What is pollution? What are some forms of pollution? Questions What is pollution? What are some forms of pollution?

Pollution Pollutants – harmful substances in the air, water, or soil.

Water Pollution How would you feel if you turned on your water faucet and a stream of nice, fresh, bright green water came out? Many things can make water unsafe to drink but don’t change its color, taste, or smell. Water pollution is anything that has a harmful affect on the water or the living things in the water

Water Pollution What types of water can be polluted? Surface water Ground water Even rain! Pollution can result from natural causes and human activities

Sources of Water Pollution The major sources of water pollution are human wastes, industrial wastes, agricultural chemicals, and runoff from roads.

Human Wastes Human wastes can carry bacteria that causes diseases Sewage can leak wastes into drinking water Wastes can also come from farm animals If you boil water it kills many disease causing organisms

Industrial Wastes Some factories release toxic chemicals into nearby rivers and lakes Many power plants, factories, and cars pollute the air – it then falls as acid rain Pouring hot water into lakes and rivers can kill living organisms

Water Pollution: Agricultural Chemicals Runoff from Roads Runoff from farms can carry fertilizers and pesticides that pollute water Runoff from Roads Oil, gasoline, and salt from cars can runoff the road to pollute rivers and lakes

Soil Pollution Soil can become polluted by Landfills People burying hazardous wastes Polluted ground water

Air Pollution Some air pollution is natural (volcanoes, animals), but most is caused by humans Factories, cars, and power plants release toxins into the air which create smog and acid rain.

Where are we now? We have made new laws to protect our environment, but we still have a ways to go. You can do things to help keep our Earth clean *Recycling Don’t litter Conserve energy