Energy09

List 10 things in your life/home that require energy and make

your life better1. 12.

2. 13.

3. 14.

4. 15.

5. 16.

6. 17.

7. 18.

8. 19.

9. 20.

10. 21.

11. 22.

For your object

• Tell what kind of energy goes in

• Tell what kind of energy transformations happen inside it

• Tell what kind of energy it puts out

Laws of Thermodynamics

• 1: energy cannot be created or destroyed, it can only change forms

• 2: whenever energy changes from one for to another, some usable energy is lost as heat

How “efficient” is something

• Compares the energy it takes it with the energy it puts out

• Incandescent vs CFL bulbs

• A car = • Human muscles = • Power plant =

Life on the other side of the plug:

Where does electricity come from?

Life on the other side of the plug

• How is electricity made?

• Put these words in order: generator, fuel, steam, turbine, water

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

What do we use as fuel?

• • • • • •

Which of these is renewable?Can a non-renewable source be used in a sustainable

way?

In what proportions



A historical perspective



Uses of Energy



Uses of energy



How do they work?



What to do

• Ready about your type at http://www.energyquest.ca.gov/ (computer = “energy story”

• Determine all of the transfers of energy that happen

• Report on the pros and cons of this kind of energy

Transfers # of transfers

pros Cons

Fossil Fuels

# of transfers Pros Cons



Biomass




Nuclear




Hydroelectric




Wind




Solar




Is there ONE solution?



Can you power the city?

• Google “Power up”

• Choose the link from “sciencenetlinks”

• Try to make a winning combination

• What happens if you only choose renewable energy?

How can consumption be reduced?

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•

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How “efficient” is a hot plate?



Energy09

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