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All about Energy

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Page 1: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

All about Energy

Page 2: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

The Big Ideas!

• Energy exists in different forms

• Energy can change forms but is never lost

• Technology improves the ways people use energy

Page 3: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Different Forms of Energy have different uses.

• Almost everything occurring around you involves energy.

• All forms of energy have one important point in common---they cause changes to occur.

• Energy: is the ability to cause change or do work.

Page 4: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Forms of Energy

• Mechanical• Sound • Chemical• Thermal• Electromagnetic• Nuclear

Page 5: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy• Mechanical Energy: the energy

that moves objects

Page 6: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy• Sound Energy: energy from the vibration

of particles in a solid, liquid, or gas

Page 7: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy• Chemical Energy: energy that is stored in

the chemical composition of matter.

Page 8: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy• Thermal Energy: the total amount of

energy from the movement of particles in matter.

Page 9: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy• Electromagnetic Energy: energy

transmitted through space in the form of electromagnetic waves. (visible light, x-rays, microwaves)

Page 10: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Exploring the Forms of Energy

• Nuclear energy: the source of nuclear energy is the nucleus

Page 11: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Kinetic versus Potential Energy• Kinetic energy: the energy of motion • Kinetic energy INCREASES as mass

INCREASES• Kinetic energy INCREASES as speed

INCREASES

Page 12: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Kinetic versus Potential Energy• Potential energy: the stored energy that an

object has due to its position or chemical composition.

Page 13: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Energy can change forms but is never lost!

Page 14: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Energy can change forms but is never lost!

• Potential energy is stored in chemicals on the head of a match. The flame of the burning match releases that energy as light and heat.

Page 15: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Using Energy Conversions

Page 16: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Converting Energy in a Dam

1. Water held behind the dam has potential energy

2. Potential energy is converted to kinetic energy when the water moves through the tunnel

3. Kinetic energy is used to turn turbines. This mechanical energy is converted into electrical energy by generators.

4. Electrical energy is transmitted through the wires, and then converted into

many forms of energy

Page 17: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Law of Conservation of Energy!

• States that energy can neither be created nor destroyed.

• Energy changes form

Page 18: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Energy Efficiency

• A measurement of usable energy after an energy conversion.

• Energy-efficient household appliances.

Page 19: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Technology improves the use of energy resources.

Solar Cells: made of several layers of light-sensitive materials, which convert sunlight directly into electrical energy.

Page 20: All about Energy. The Big Ideas! Energy exists in different forms Energy can change forms but is never lost Technology improves the ways people use energy

Technology improves the ways people use energy!

• Efficient lights

• Efficient cars

• Solar energy

• Wind energy


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