Waves G8 Ish

Front 1

What are two types of waves that transfer energy?

Back 1

Mechanical Waves and Electromagnetic Waves

Front 2

What are Mechanical Waves?

Back 2

Energy is transferred as the wave travels through matter.
Example - waves you can see. A water wave is created when you throw a rock in water.

Front 3

What are Electromagnetic Waves?

Back 3

Do not travel through matter. Can transfer energy through empty space. Example-
Energy received by the sun is transferred through space by electromagnetic wave. Lignt is the only electromagnetic wave you can see.

Front 4

List rays in order on the Electromagnetic Spectrum from shortest waves to longest.

Back 4

Gamma ray, x-ray, ultraviolet ray, visible ray, infarared, microwave, radio.

Front 5

What is the trough?

Back 5

The lowest point of the wave.

Front 6

What is the wave length?

Back 6

the distance from one trough to another trough, one crest to another crest, or one starting point to another starting point.

Front 7

What is frequency?

Back 7

the number of waves watched passed a point in one second.
Example- ocean - one wave per second.

Front 8

Electromagnetic waves have

Back 8

wide range of wave lenghts, frequencies, and levels of energy. The speed at which they travel through space is the same. They travel at the speed of light.

Front 9

What is the Electromagnetic Spectrum?

Back 9

A chart that lists electromagnetic waves according to their wave lengths.

Front 10

Most waves are...

Back 10

Invisible.

Front 11

The waves that our eyes can see are...

Back 11

labelled light.

Front 12

Waves with the highest frequency have

Back 12

the shortest wavelength, highest energy

Front 13

Waves with the lowest frequency have

Back 13

the longest wavelength, lowest energy.

Front 14

List some mechanical waves.

Back 14

rainbow, rock thrown in water, waves, flag blowing, tuning fork mounted on a sound board, avalanche

Front 15

List some electromagnetic waves.

Back 15

x-ray, telephone, microphone, t.v., light bulb, doppler radar, radio,

Front 16

Electromagnetic waves surround you. They make you...

Back 16

see, keep you warm, cook your food and transmit information.

Front 17

Radio waves have the longest...

Back 17

wave lenghts. range from 10,000 kilometer to one millimeter.

Front 18

Can you hear radio waves?

Back 18

No. You must use a radio to detect them.

Front 19

Various stations in an area broadcast at different...

Back 19

frequencies. There you must tune your radio to choose a frequency that you want to listen to.

Front 20

Radio waves. The antennae on your television set receive the signmal in the form of what?

Back 20

Electromagnetic wave that is broadcasted from the t.v. station. It is displayed on your t.v. screen.

Front 21

Cable companies have _________
which receive waves broadcasted from your local t.v. station. The signal is then sent through a cable to your house.

Back 21

antennae or dishes.

Front 22

Cellular phone also use radio waves to transmit information. These waves are much __________ than t.v. and f.m. radio waves.

Back 22

smaller. Antennae on cell phones are smaller than the antennae on your radio.

Front 23

How does the radio work?

Back 23

1. Disk Jockey speaks into the microphone.
2. Microphone changes these vibrations into electric currents to make radio waves.
3. station transmitter broadcasts waves through the atmosphere.
4. waves pass through walls and reach your antenna in your raio.
5. radio waves are then changes back into electric currents.
6. speakers change the electric currents into sound vibrations so you can again hear the disk jockey.

Front 24

Radio waves are also used to broadcast what?

Back 24

t.v. programs. These waves carry both audio and video information. t.v. circuits seperate information.

Front 25

What else are radio waves used for?

Back 25

cell phones.

Front 26

a wave that you find in the ocane

Back 26

wave longetudel

Front 27

what do waves traval thu

Back 27

energy

Front 28

a come word for wave

Back 28

puls

Front 29

a obgect that a waves trave thru

Back 29

median

Front 30

the shock wave

Back 30

longitudiwal

Front 31

taco

Back 31

squid