Communications

What is the shape of the "cells" that cell phone networks are divided into?

• A

• B

• C

• D

What is one advantage of the fact that cell phones don't need much power to operate?

• They can operate on small batteries

• They do not need to be recharged

• You can use them underground

• They rarely run out of power

What can you infer from the fact that cell phones usually don't work underground?

• Landlines do not work underground either

• The earth's magnetic field drains cell batteries

• Low power radio waves do not travel well through rocks and earth

• Duplex channels cannot exist below sea level

Which phrase best describes the earliest cell phones?

• Lightweight and easily broken

• Heavy and expensive

• High powered and long lasting

• Bulky but cheap

How does a cell phone differ from a cordless phone connected to a land line?

• Cell phones allow you to stay connected over long distances; cordless phones do not

• Cell phones emit visible light waves; cordless phones emit sound waves

• Cell phones only work in big cities; cordless phones work everywhere

• Cell phones are small and white; cordless phones are small and heavy

What does a duplex channel system allow you to do?

• Text message and make phone call at the same time

• Take two calls at once

• Talk and listen at the same time

• Browse the internet

Place the following events in the correct sequence: A) A base station contacts the MTFO; B) You dial a number on your cell phone; C) Your phone contacts a base station

• A - C - B

• C - B - A

• B - C - A

• C - A - B

What other device receives the same type of electromagnetic waves as a cell phone?

• A

• B

• C

• D

How were the earliest cellular networks different from today's networks?

• They forced users to stay within a single cell

• They had octagon shaped cells

• They used sound waves, not radio waves

• They did not use base stations

What role did Japan and Scandinavia play in the development of cell phone technology?

• The cellular phone was invented in Sweden

• The first military cell phones were used by the Japanese army during WWII

• The first cell phone call was from Oslo to Osaka

• The first cell networks were established in these places