1. Energy: Forms and Changes

2. Questions to think about
What is energy?
Does energy come in different forms?
What do we need energy for?
Can we make energy?
Is all energy the same?
Where does energy come from?

3. Nature of Energy Energy is all around you!
You can hear energy as sound.
You can see energy as light.
And you can feel it as wind.

4. Nature of Energy You use energy when you: hit a softball.
lift your book bag.
compress a spring.

5. Living organisms need energy for growth and movement.
Nature of Energy
Living organisms need energy for growth and movement.

6. Nature of Energy Energy is involved when: a bird flies.
a bomb explodes.
rain falls from the sky.
electricity flows in a wire.

7. Nature of Energy What is Energy? Energy = to do work.
If an object or organism does work (exerts a force to move an object) the object or organism uses energy.

8. States of Energy: Potential and Kinetic
All energy can be categorized as Potential or Kinetic energy.
Potential Energy is stored energy.
Kinetic Energy is the energy of motion.

9. Kinetic vs. Potential Practice
Classify the following as a type of potential energy or kinetic energy (use the letters K or P)
1. A bicyclist pedaling up a hill _____ An archer with his bow drawn _____
3. A volleyball player spiking a ball ___ A baseball thrown to second base ____
5. The chemical bonds in sugar ____ The wind blowing through your hair _____
7. Walking down the street _____ Sitting in the top of a tree _____
9. A bowling ball rolling ____ A bowling ball sitting on the rack _____ K P K K P K K P K P

10. Common Forms of Energy Some common forms of energy are: Chemical
Electrical
Electromagnetic
Thermal/Radiant
Nuclear
Mechanical
Gravitational
Elastic
Sound

11. Name as many of the types of energy as you can.
A - Electrical
B – Chemical
C - radiation
D - Mechanical (Kinetic)
E - radiation
F - Mechanical (Potential)
G - Chemical

12. Why Protect Earth’s Environment?
Earth’s environment includes all of the resources, influences and conditions near its surface.
The basic resources:
Air
Water
Land
Sunlight

13. Earth’s Environment Contains: Renewable Resources
Nonrenewable Resources

14. Renewable Resources Examples: Oxygen (O2)
A resource that can be replaced in nature at a rate close to its use.
Examples:
Oxygen (O2)
Trees
Food grown in soil
Energy from the sun

15. Nonrenewable Resources
A resource that exists in a fixed amount that can not be replaced by nature, at the same rate it is used.
Examples:
Fossil Fuels
Metals
Nonmetals
Helium