1. Energy
S6E6.a Explain the role of the sun as the major source of energy and the sun’s relationship to wind and water energy.
S6E6.b Identify renewable and nonrenewable resources

2. What is energy?
Energy is the ability to do work.

3. Why is energy important?
We use energy to do everything we do.
Thinking
Playing
Working
Cooking
You name it!

4. What is the ultimate source of all energy on Earth?
The Sun!
The sun’s energy powers all other energy sources.
The sun’s energy powers wind and waves.
Plants convert the sun’s energy into fuel we can use through photosynthesis.

5. What are the two types of energy?
Potential Energy
Stored energy
Kinetic Energy
Energy of motion

6. In what forms are potential energy and kinetic energy found?
Heat or thermal energy
Light (radiant)
Mechanical/kinetic
Electrical,
Chemical,
Nuclear energy

7. How are these forms of energy stored?
Renewable resources
an energy source that can be replenished in a short period of time
Nonrenewable resources
an energy source that we are using up and cannot recreate in a short period of time

8. Secondary Energy Sources
An energy source (or carrier) derived from the conversion of other sources of energy, such as coal, nuclear, or solar energy. These are called primary sources.
Electricity
Hydrogen

9. How is energy used in homes?
Most energy in homes is used for heating.

10. What are the sources of renewable energy?
What are the pros (good things) about using these resources?
What are the cons (bad things) about using these resources?

11. Solar Energy Energy from the Sun
Solar energy is the sun’s rays (solar radiation) that reach the earth.
Solar energy can be converted into other forms of energy, such as heat and electricity.

12. Solar Energy
Solar energy can be converted to thermal (or heat) energy and used to:
Heat water – for use in homes, buildings, or swimming pools.
Heat spaces – inside greenhouses, homes, and other buildings.

13. Solar Power Advantages
Solar energy is free
Its supplies are unlimited.
Using solar energy produces no air, sound, or water pollution
Low maintenance on equipment because no moving parts
Photovoltaic cells can be used on a variety of products (The little panel on your calculator)

14. Solar Power Disadvantages
The initial investment in equipment can be very expensive
Solar power plants require a lot of room and can affect environment in areas where they exist
Requires sunlight so it is not produced 24 hours a day
Requires expensive batteries to store energy for use on cloudy days and at night