1. Next Review Session is: Wednesday 5/24 @ 3:15 PM
Date: May 19th, period 5
Aim # 80: How can technology be used to help the environment?
HW:
Castle Learning (QUIZ #3) due next MONDAY
Human Impact Test next Wednesday
Ecology Test Corrections due next Thursday
RRB pages due next Friday
Do Now: Have your RRB open to page 9 for homework credit!
Next Review Session is: Wednesday 3:15 PM

2. Next Review Session is: Tuesday 5/23 @ 3:15 PM
Date: May 19th, period 1
Aim # 80: How can technology help the environment?
HW:
Castle Learning (QUIZ #3) due MONDAY
Human Impact Test next Wednesday
Ecology Test corrections due next Thursday
RRB pages due next Friday
Do Now:Have your RRB open to page 9 for homework credit!
Next Review Session is: Tuesday 3:15 PM

3. Aim #80: How can technology be used to help the environment?

4. 1a) Alternative Energy Sources:
Hydroelectricity – dammed water is
sent through a turbine & generates
electricity.
Advantages:
Little or no air pollution
Does not depend on fossil fuels
Disadvantages:
Disruptive to surrounding aquatic
ecosystems.

5. 1b) Alternative Energy Sources:
Wind Power – wind spins
turbine blades to produce
electricity.
Advantages:
Little or no pollution
Does not require the
consumption of water to
operate.
Disadvantages:
The intermittency of wind
Need a lot of turbines to generate as much energy
of one fossil fuel power plant.

6. 1c) Alternative Energy Sources:
Solar Energy – the use of the sun’s
energy to generate electricity.
Advantages:
Relatively pollution free.
Technology is becoming more
affordable.
Disadvantages:
Not available at night & reduced during cloud cover.
Photoelectric Cell

7. 1d) Alternative Energy Sources:
Nuclear Energy – energy
produced from the splitting of
atoms.
Advantages:
Water vapor is the only
emission.
2) Low fuel costs (uranium)
Disadvantages:
Waste is radioactive & must be properly contained
for thousands of years.
2) High maintenance costs.

8. 2) Energy Conservation:
We need to conserve energy by reducing our
usage of everyday products we have come to
rely on.
Ex: Turn off lights when not in use, Carpooling,
Use fan instead of air conditioner, etc…

9. 3) Individual Choices & Societal Actions:
Solutions to these environmental problems require an
analysis of costs & benefits.
Example: You can only drive your
car to work.
Benefits:
1) Less pollution
2) Conserve natural
resources
3) People may exercise
more
Costs:
Inconvenience
Loss of jobs in oil industry
Lose contact with friends
We must determine which trade-off (compromise) is
acceptable.