Information Technologies

What type of information does a doorbell share?

• That someone is at the door.

• That someone is calling on the phone.

• That you have received a text message

• That your food has heated up

How did the electrical telegraph transmit information?

• through the use of wave pulses as dots and dashes

• through the use of a visual alphabet

• by ringing

• loud echoes

How are letters transmitted in morse code?

• As letters, like on a paper

• different combinations of dots and dashes

• different combinations of 1s and 0s

• written in pencil

What does EM stand for?

• Electric Monkey

• Electromagnetic

• Emergency Man

• Extra Mayo

Choose all of the electromagnetic signals from below.

• Visible Light

• Infrared Waves

• Microwaves

• Radio Waves

• Gamma Rays

Describe the speed of EM signals.

• Fast

• Slow

• The speed of light

• The speed of a turtle

How do analog signals record?

• they continuously record some kind of action

• they continuously record numerical values at a set of continuous intervals

• as numbers

• as waves

How do digital signals record?

• they continuously record some kind of action

• they continuously record numerical values at a set of continuous intervals

• as numbers

• as waves

Choose one advantage of analog signals.

• high resolution through continuous recording

• hard to record/ take up a lot of space (technically two, I know)

• recorded as numbers, easy to store

• data can be missed between intervals

Choose one disadvantage of analog signals.

• high resolution through continuous recording

• hard to record/ take up a lot of space (technically two, I know)

• recorded as numbers, easy to store

• data can be missed between intervals