Types of Energy
Energy of Motion
Kinetic Energy
Explain the transformation that takes place when you rub your hands together.
Mechanical (movement of the hands) to thermal (heat produced from friction)
As the mass of an object moving at a given speed decreases its kinetic energy will _________________.
Decrease
Wind turbines convert _________________ energy into electrical energy.
Mechanical
Form of energy with electrons travelling through wires and circuits to power electronics.
Electrical Energy
The type of Energy that depends on mass and position
Potential energy
Explain the transformation that takes place when you turn on a flashlight.
Chemical (of the battery) to radiant (of the light)
As the speed of a falling object increases, its potential energy will _____________________.
Decrease
Hydroelectricity can generate electricity because of the initial _______________________ energy of the water.
Potential
Form of energy stored in chemical bonds for use at a later time.
Type of energy that depends on the speed of molecules.
Thermal or heat energy
Explain the transformation of a book falling from table and thumping onto the floor.
Gravitational Potential (falling book) to sound( the thumping sound)
When a person jumps on the end of a diving board causing it to bend, what energy is being stored in the diving board?
Elastic Potential Energy
Wind energy, coal energy, nuclear energy, ethanol energy, hydroelectric energy and solar energy all are used to make electricity. However, solar energy is different, what do all the other energy sources do that solar energy does not?
Solar energy requires a single energy conversion whereas the others require multiple.
A device that transforms kinetic energy into electrical energy.
Turbine (generator)
Type of energy that produces noises and can be heard.
Sound Energy
Explain the transformation of energy that occurs in a coal burning power plant. 3 Step
Chemical (coal) to thermal (heat released from breaking the bonds of coal to boil water)to electrical (the turbine is connected to a generator that makes electricity)
A basketball is dropped from a height of 2m and another identical basketball is dropped from a height of 4m. Which ball has more kinetic energy just before it hits the ground?
The basketball dropped from a height of 4m because it has more speed.
Explain hydroelectric energy
Hydroelectric energy is using the potential energy of water and turning it into electrical energy.
State the Law of Conservation of Energy
Energy can not be created of destroyed it can only be transferred or tranformed.
Type of energy based on the electromagnetic spectrum.
Radiant Energy
Explain the transformation that takes place to make a battery powering on a phone that plays a tune when starting up. (3 Step)
Chemical (battery) to electrical (electrical energy flowing through circuits) to sound (tune playing).
When you drop a tennis ball, it hits the floor and bounces back up. But, it does not reach the same height as before and each time bounce is smaller than the previous one. However, you notice the tennis ball is slightly warmer after it finishes bouncing. Explain how the law of conservation of energy is obeyed.
During each bounce, some of the kinetic energy of the ball in transferred into thermal energy. As a result, energy is not created or destroyed, but only changes form so that the law of conservation of energy is obeyed.
Explain how plants are able to use sunlight for food.
Plants take in radiant (light) energy from the sun and using chemical reactions can create sugar (food) for chemical energy.
Name the 6 primary types of energy.
Mechanical, Chemical, Radiant, Thermal, Electrical, Sound, (Nuclear)