Unit 8: Energy Note Packet 1: Introduction to Energy Use

Transcription

1 Name: Period: Unit 8: Energy Note Packet 1: Introduction to Energy Use -Use the Introduction to Energy handout to fill out the following notes. 1. What is Energy? -Definition: -Main tasks that energy does: 2. Forms of Energy 1. Produces 2. Produces 3. Produces 4. Produces 5. Produces 6. Powers -Two categories: Potential Energy -Definition: -Forms of Potential Energy 1. -This energy is stored in

2 -Kinetic Energy -It is the energy that -Examples: 2. -This is energy stored in by the application of a -Examples: 3. -This is energy stored in the of an atom- the energy that. -This energy can be released using a process called. -This is how power plants work. 4. -This is the energy of. -Example: A resting on top of a hill has gravitational potential energy because of its. So does in a reservoir behind a dam. -Definition: of waves, electrons, atoms, molecules, substances, and objects. -Forms: 1. -The movement of. -When electrons move through a wire it is called 2. -Examples: 3.

3 -This is the internal energy in substances- the molecules and atoms vibrate within a substance, the energy they possess and the they become. -Example: 4. -Movement of objects from -Example: Law of Conservation of Energy -Energy is -When we use energy, we do not use it completely-. -Examples of energy changing form: 4. Energy Efficiency 1. A person eats an apple to get energy to ride a bike. -The energy changed from to 2. A car is filled with gasoline so that it can move. -The energy changed from to 3. The sun provides energy for plants to produce chemicals through photosynthesis. -The energy changed from to 4. A stove is plugged into an electric source and uses that energy to create heat to cook food. -The energy changed from to -Definition: -If a machine were 100% efficient, it would. However, converting one form of energy into another always involves a usually in the form of energy.

4 Exercise #1: 1. Watch the Exxon Mobile commercial. Once it is over, write down everything you saw/can remember that required energy in the space below. Exercise #2: 2. Think through an average day in your life. From the time you wake up to the time you go to sleep, and even the time you are sleeping. In the space below, list everything you do each day that requires a source of energy.

5 5. Sources of Energy -The ten major energy sources we use today are classified into two broad groups: 1. -Nonrenewable energy sources include -They are called nonrenewable because they cannot be 2. -Renewable energy sources include -They are called renewable because their supplies -U.S. Energy Consumption by Source, Nonrenewable a. Petroleum: b. Natural Gas: c. Coal: d. Uranium: e. Propane: 2. Renewable a. Biomass: b. Hydropower: Which category of energy source currently provides us with most of our energy? a. nonrenewable b. renewable c. Wind: d. Geothermal: e. Solar:

6 6. Goals of Production 1. Make 2. Make 7. Current Practices -Heat/cool homes -Cooking -Transportation A. Producing Electricity 1. Definition: 2. Used to power homes, buildings, factories and some cars. 3. How its made: - an electrically conductive material through a using an electric generator. 4. Electric Generators a. Require to make electricity b. Energy usually comes from burning c. How Generators work: d. Burning fossil fuels is an example of a -Even though fossil fuels are naturally occurring, the rate at which they replace themselves is so slow compared to how much we take out of the earth.

7

8 B. Making Fuel 1. Definition: material such as coal, gas or oil that is burned to produce heat or power. 2. (Current) Major sources of fuel a. b. c. 3. Production of Fuel a. Coal b. Oil - out of the ground -coal is then processed into fine and sent to to go into generators. -oil is out of huge wells that have been dug deep into the ground. (This may occur on land or in the ocean). -oil is then into: c. Natural Gas -gasoline, diesel fuel, kerosene, etc. -natural gas is taken out of the earth by -fractures are made in the surface of the earth, and using machines the natural gas is extracted. -gas is processed and and then used as fuel for homes and some transportation services.