1. Non-renewable
&
Renewable
Resources

2. 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.

3. 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

4. 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!

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

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

7. 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

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

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

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

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

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

13. 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

14. 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!

15. 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?

16. POLLUTION

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

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

19. 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

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

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

23. 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

24. 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

25. 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

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

27. 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.

28. 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