Force that pulls objects towards the Earth's surface
What is gravity?
100
The energy of motion
What is kinetic energy?
100
The energy you use to put a book on a shelf is ____ energy.
What is mechanical?
100
Electrical energy in a light bulb is changed into ______ and ______ energies.
What is light and heat/thermal energies?
100
Solar energy from the ______ can produce electrical energy quietly and cleanly.
What is Sun?
200
In addition to potential energy from gravity, substances can contain potential energy due to _______.
What is chemical composotion or arrangement?
200
As mass and _____ increases, so does kinetic energy.
What is speed?
200
If a biker beeps her horn, you can detect these vibrations in the air produced by ______ energy.
What is sound?
200
In a hydroelectric dam, potential energy is converted to kinetic energy when the water ______ through the tunnel.
What is moves?
200
An advantage of solar energy is that the supply is ________.
What is not limited/unlimited?
300
A jack-in-the-box is an example of potential energy due to the spring being _________.
What is compressed or pushed in.
300
Kinetic energy can be converted into _____ energy.
What is potential energy?
300
Our largest source of energy.
What is the Sun?
300
A car changes energy into different forms. The total amount of energy does not change due to The Law of __________.
What is Conservation of Energy?
300
Sunlight is changed into electrical energy by a _______ cell.
What is solar?
400
A boy is swinging on a swing. At what point will he have the MOST potential energy?
What is the highest point?
400
If a speed skater has less mass than another skater, he or she could increase their ______ to gain kinetic energy.
What is speed?
400
Another term for thermal energy is _____ energy.
What is heat?
400
In many energy conversions, the largest amount of wasted energy often ends up as _______.
What is heat?
400
A disadvantage of solar energy is that the materials used to make the cells are very ________.
What is expensive?
500
An apple on a tree branch has potential energy. The apple can be eaten so it has what form of potential energy?
What is chemical energy?
500
If a soccer ball and bowling ball were moving at the same speed, the ________ ball would have more kinetic energy because of its greater mass.
What is the bowling ball?
500
Examples are X-rays and microwaves.
What is electromagnetic energy?
500
One important difference between fossil fuels and sources of energy is that fossil fuels cannot be ______ once they are used up.
What is replaced?
500
Satellites orbiting Earth use solar cells as their source of electrical energy. Solar cells are ideal energy sources for satellites because ____________________.