Energy does things for us. Make a list of all the ‘things’ you think energy does

Warm-up: What is Energy? Energy does things for us. Make a list of all the ‘things’ you

think energy does

Warm-up: #2 on sheet #7 Now that you understand a little

more about the efficiency of energy transformation, how much do you think you’d need to eat if our bodies were 100% efficient at converting food (chemical energy) to motion/sustaining life?

What is Energy?

Energy is defined as The ability to produce change or do work

We recognize the tasks energy does as: Light Heat Motion Sound Growth Technology

2 Forms of Energy

Potential – Stored energy and the energy of position (gravitational).

Kinetic – Motion energy. The motion of waves, electrons, atoms, molecules and substances.

2 Forms of Energy Look at the summary card of Energy Forms

at your table – one is highlighted Use the white-board at your table to make a

mini-poster of that form of energy Your poster must have:

Large title stating the form of energy Whether it is Potential or Kinetic Energy Picture representing where the energy is stored Picture representing an example of that type of

energy You are done with this task at: ___________

Gallery Walk of Energy

You have ___ minutes to visit each others posters

Be sure to write down: Type of energy Whether it is Potential or Kinetic Draw picture or write down where the

energy is stored and an example You are back in your seats at:

____________

Energy Transformations

Energy is conserved We don’t use it up, it just changes form When energy changes form, the total

quantity of energy remains the same *** Except when mater is converted to

energy during nuclear fusion and fission

Examples of Energy Transformation:

Examples of Energy Transformation:

Examples of Energy Transformation:

Examples of Energy Transformation:

Energy Efficiency

Energy isn’t gained or lost when it changes form

BUT it doesn’t ALL change from one form to the next

Efficiency: how much useful energy you get out of a system Energy transformation isn’t very efficient

Energy Efficiency

Energy transformation isn’t very efficient

Energy Efficiency

Energy Efficiency

Energy transformation isn’t very efficient

Light

Energy Efficiency on a large scale: Power Plants

Flashlight demo

It’s all about turning turbines

It’s all about turning turbines

Renewable and Non-renewable EnergyNON-RENEWABLE

Cannot be replenished in a short period of time

RENEWABLE

Supplies are replenished in a short amount of time

Question: Is Electricity a Renewable or Non-Renewable Resource?

36.50%

24.70%

20.90%

8.80%1.00%

4.10%2.80% 0.70% 0.40% 0.10%

Where We Get Our Energy – The US as a whole

Where We Get Our Energy- Seattle in particular

87.90%

6.40%

2.50% 2.10%

1.10%Other Sources

Energy Consumption

What is energy ‘doing’ for you right now?

On your white boards: Draw a picture or make a list of all the

ways your have used energy in the past hour

Be ready to share your board in 5 minutes

Energy Consumption

We all use different amounts of energy

The average American uses about as much energy as is stored in 7 gallons of gasoline.

That’s every person, every day. Over a course of one year, the sum

of this energy = to about 2,500 gallons of gasoline per person.