Communication and Waves

A _______________________ is a disturbance that travels through a medium moving energy (not matter)

• wave

• signal

__________________________ can be sent through many forms of communications like, signal fires, morse code, sign language, information encoded on to the teacher’s ID card, etc

• Signals

• Waves

Sound waves _____________________________ travel in space.

• do

• do not

What waves carry information to your TV and radio ?

• Radio
• Microwaves
• Gamma
• AM

What are advantages to using light waves to communicate?

• light waves travel far

• light waves travel quickly

• light waves can travel through solids

• light waves travel far and fast

Which statement explains why sound cannot travel across the space between two planets?

• Sound waves need oxygen to move.

• Sound waves need a medium to move.

• The temperatures in space are too cold.

• The distances between planets are too great.

Which statement best shows an example of a wave being used to transmit a message?

• A motor boat travels down a lake.

• A lamp is turned on by plugging it in.

• A student writes a note on a piece of paper.

• A drummer uses a series of beats to start the band.

Which types of waves are used to send waves between spacecrafts and Earth?

• sound waves

• light waves

• electromagnetic waves

• UV rays

Which is NOT an example of communication?

• listening to the radio

• using the microwave to warm up dinner

• a whistle blowing at a football game

• talking to Aunt Sally on the telephone

How were people in history able to communicate over long distances?

• sound waves: used drums to communicate over long distances

• light waves: light from lamps and lanterns

• radio/sound waves: morse code to carry encoded information

• all of the above