1. Resources for Energy
State Objective 4.d.

2. What are Resources?
Natural resources are the parts of the environment that are useful or necessary for the survival of living organisms.

3. Two Types of Resources
Renewable resources are resources that are constantly being recycled or replaced by nature. For example, sunlight, water, and air.

4. Renewable Resources

5. Two Types of Resources
Nonrenewable resources are resources that are used up more quickly than they are replaced.
Ex. Minerals, metals, & fossil fuels

6. Nonrenewable Resources

7. Energy Use
Most energy used by humans comes from fossil fuels.

8. Fossil Fuels
Made of hydrocarbons, compounds that contain carbon and hydrogen atoms.
Combustion is the process of burning fossil fuels to release energy.
Carbon dioxide and water are two other products of combustion.

9. Coal
Coal is a sedimentary rock formed from dead plant matter that is buried underwater
Most is used for electrical power plants.

10. Petroleum (Oil)
Petroleum (oil) is a mineral made from the remains of dead marine organisms buried in Earth’s crust.
Provides one-third of world’s energy.
Can be turned into gasoline, diesel fuel, paints, and plastics.

11. Natural Gas
Natural gas is a colorless, odorless gas made mostly of methane
Made mostly of methane but contains other gases.
Often found with oil deposits.

12. Alternative Energy Sources
Why is it important that we find alternatives to fossil fuels? Give at least three reasons.

13. Alternative Energy Sources
Hydroelectric power is produced when falling water is used to turn the turbine in an electric generator. No pollution is produced but building dams can damage habitats.

14. Hydroelectric Power

15. Pickwick Dam

16. Alternative Energy Sources
Wind power generates electricity by using windmills to turn the blades of a generator.

17. Alternative Energy Sources
Nuclear energy is released when the nuclei of uranium atoms are split apart.
Energy is used to produce steam to turn the blades of a generator.
Does not produce air pollution but does produce radioactive wastes.

18. Nuclear Power

19. Alternative Energy Sources
Geothermal energy is heat energy contained in Earth’s crust.
Used to produce steam to generate electricity.

20. Geothermal Energy

21. Alternative Energy Sources
Biomass is a renewable energy source made from living or recently living organisms.
Examples include garbage, wood, wastes, landfill gases.

22. Biomass

23. Alternative Energy Sources
Solar energy is the leading alternative to fossil fuels because it is inexhaustible and produces no pollution.
Very expensive.
Photovoltaic cells are devices that convert light energy into electric energy.

24. Solar Panels

25. Human Effect on the Environment
Pollution

26. Pollution
A pollutant is any substance that contaminates the environment.
Examples of air pollutants include smoke, ash, carbon monoxide, and carbon dioxide.

27. Greenhouse Effect
The greenhouse effect is the natural trapping of the Sun’s heat by the Earth’s atmosphere. Gases that contribute to the greenhouse effect include water vapor, carbon dioxide, and methane.

28. Greenhouse Effect

29. Global Warming
As more CO2 is added, the atmosphere traps more heat, causing global warming.

30. Effects of Global Warming
It changes rainfall patterns.
It may increase the amount of storms and hurricanes.
It could cause the polar ice caps to melt.

31. Global Warming
Sea-level rise is an increase in sea level that may be caused by global warming.

33. Ozone Depletion
The ozone layer of the atmosphere absorbs harmful ultraviolet (UV) radiation from the Sun.
Ozone depletion is the thinning of the ozone layer.
Allows more UV radiation to reach Earth and could cause an increase in skin cancer.

34. CFCs

36. Effects of Overpopulation
inadequate freshwater
depletion of natural resources
increased pollution
loss of biodiversity or entire ecosystems
global warming
mass extinctions

37. Conserving Resources & the Environment
How Can We Help?
Conserving Resources & the Environment

38. Ways to Conserve Energy
1. Turn off lights when not in use.

39. Ways to Conserve Energy
2. Car pool or use public transportation.

40. Ways to Conserve Energy
3. Walk or ride a bicycle.

41. Ways to Conserve Energy
4. Use energy efficient appliances and bulbs.

42. Ways to Conserve Energy
5. Research new ways to depend more on alternate energy sources.