Ciencias

Alondra N. Morales Pantoja 8-C March 13, 2012




Take Home Test

1. Kinetic energy- the energy of motion

Potential energy- theenergy an object has because of its position

Mechanical energy- the total energy of motion and position of an object

Thermal energy- all the kinetic energy due to random motion of theparticles that make up an object

Chemical energy- the energy of a compound that changes as its atoms are rearranged

Electrical energy- the energy of moving electrons

Sound energy-caused by an object’s vibrations

Light energy- produced by the vibrations of electrically charged particles

Nuclear energy- energy that comes from changes in the nucleus of an atom

2.Energy conversions are important because they are needed for everything we do like heating our home, getting energy from a meal, and many other things use energy conversions.

3. Two examples ofenergy conversions are a hair dryer and an alarm clock.

4. The law of conservation of energy states that energy cannot be created or destroyed but can be changed from one form to another.

5. Thedifference between a renewable and non-renewable resource is that renewable resources are naturally replaced more quickly than they are used and non-renewable resources cannot be replaced or arereplaced much more slowly than they are used.

6. Two examples of non-renewable resources are coal because is a solid fossil fuel that is formed over millions of years and natural gas because compared toother fossil fuels it has very low emission levels when burned.

7. Two examples of renewable resources are solar energy because the sun’s energy can be used to heat the house and wind energybecause the kinetic energy of wind can turn the blades of a windmill.

8. Puerto Rico should start using renewable energy so we could save or economize energy.

9. Some types of renewable energy that...