Energy Transfer Electric Circuits Study Guide

Question 1

How many different appliances have you used today that plugged into an electrical socket? Any item that has a plug like this…

Answer 1

Runs on electric currents.

Question 2

Electric current is a steady flow of…

Answer 2

Energy particles with an electric charge.

Question 3

When an appliance is turned on, the electrical energy can be _____________. Was there _____ __ _____? Did something ____? Was ____ produced?

Answer 3

1. Transformed into other forms of energy
2. Light or sound
3. Move
4. Heat

Question 4

Energy can transfer from place to place and transform from…

Answer 4

One type to another.

Question 5

________ _____ can travel through space from one place to another. You observe this energy movement when you grow plants in sunlight or when you lie in the grass and get warm on a sunny day. This is evidence that _____ ___ ____ _____ _____ ____ _____ _____ _____ to our planet through space.

Answer 5

1. Light energy
2. Light and heat energy from the sun are transferred

Question 6

What is happening to all the matter in the sky during a thunderstorm? Lightning is a natural occurring ____ __ ______ that flows between the clouds and ground. This flow of energy, in the form of electricity, _______ _____ that we can see from miles away. Some of the electrical energy in a lightning bolt is changed to ____ _______, which can burn the ground where it strikes. When lightning bolts crackle through the sky, they push air out of the way. When the air comes back together, we ____ thunder. The thunder you ____ during a storm is caused by the lightning that is ____________ ______ to all the air around it.

Answer 6

1. Jolt of electricity
2. Creates light
3. Heat energy
4. Hear
5. Hear
6. Transferring energy

Question 7

Thermal energy is the ______ ____ ___ __ ____ __ ____. Thermal energy is sometimes called ____ ________. Using an oven to bake a cake or using fire to roast marshmallows are examples of using thermal energy. You can release thermal energy by rubbing your hands together very quickly or by burning something.

Answer 7

1. Energy that can be felt as heat
2. Heat energy

Question 8

Light energy can _____ ________ _____ _____, air, and even some objects, such as windows. People can see forms of light energy.

Answer 8

Travel through empty space

Question 9

Sound energy travels through matter by __________. Sound energy cannot travel through _____ _____ ____ _____ ______ ___. Sometimes we can hear sound energy. Think about a television. You can ___ ___ _____ energy from the screen and ____ ___ _____ _____ from the speakers.

Answer 9

1. Vibrations
2. Empty space like light energy can
3. See the light
4. Hear the sound energy

Question 10

Many household appliances, such as washing machines, refrigerators, and dishwashers, need ________ _____ in order to work. In machines and things powered by electrical energy, ___ ___________ _____ _____ _ ____ ______ _ ______. Electrical energy is often used to generate other forms of energy. Look at the toaster. When you turn it on, what happens? ___ ________ ______ _____ _______ ___ _____ and heats up the toaster to cook your food.

Answer 10

1. Electrical energy
2. The electricity moves along a path called a circuit
3. The electrical energy moves through the wires

Question 11

Take a look at the plug on the end of an _____ ____. Notice that it has al least two metal prongs. ___ _____ __ ____ __ _ ____ ____ ______ ______ __ ___ __________ ______. ___ _____ _____ __ _________ __ _ ____ ____ _______ ______ of the device.

Answer 11

1. Electrical cord
2. One prong is part of a wire that brings energy to the electrical device
3. The other prong is connected to a wire that carries energy