Science - Topic 7, Lessons 1 & 2

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Communication and Technology; Signals

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Kerry Ben-Jacob

United States

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Science - Topic 7, Lessons 1 & 2


Froggy Jumps Science - Topic 7, Lessons 1 & 2Version en ligne Communication and Technology; Signals par Kerry Ben-Jacob 1 What is information technology? a Technology that stores, transmits, and processes information b Only computers used in schools c Writing letters by hand 2 What does software refer to? a Programs that encode and interpret information b Physical computer parts c Telephone wires 3 When did electronic computers begin to develop? a Around 1940 b 1800 c 2000 4 What is IT hardware compared to in early history? a Clay or stone tablets b Books c Chalkboards 5 What is an example of local hardware? a Processor in your phone b A distant server farm c A satellite 6 What allows you to access data stored elsewhere? a Servers b Paper c Books 7 What were early long-distance communication methods? a Smoke signals and pigeons b Phones c Emails 8 How many main types of modern transmissions are used today? a Three b One c Two 9 What do computers process more easily? a Digital signals b Analog signals c Sound waves 10 What is noise in a signal? a Random signals that interfere b Music c Voice 11 Why are digital signals less affected by noise? a They use 0s and 1s b They are louder c They travel slower 12 What is bandwidth? a Amount of information transmitted per second b Size of a computer c Length of a wire 13 What is a benefit of digital signals? a Better security b More noise c Slower speed 14 What is an electronic telegraph used for? a Sending Morse code b Watching videos c Playing games 15 What is a wave pulse? a Energy traveling through a circuit b A sound wave c A light beam 16 Who invented the telephone? a Alexander Graham Bell b Thomas Edison c Isaac Newton 17 What does a microphone do? a Converts sound into electronic signals b Stores data c Sends light 18 What are electromagnetic signals? a Patterns of electromagnetic waves b Sound waves only c Ink drawings 19 When was the first radio signal sent? a 1895 b 2000 c 1700 20 How fast do electromagnetic signals travel? a Speed of light b Speed of sound c Walking speed 21 What type of waves do mobile phones use? a Microwaves b Sound waves c Water waves 22 What type of waves do submarines use? a Extremely low frequency waves b Sound waves c Light waves 23 What do fiber optic cables use? a Light b Sound c Ink 24 What is an analog signal? a Continuous record of an action b Only numbers c Only images 25 What is an example of an analog device? a Seismograph b Computer c Phone 26 What is an advantage of analog signals? a High resolution b Easy storage c No noise 27 What is a disadvantage of analog signals? a Difficult to record b Too fast c Too small 28 What is a digital signal? a Record of numbers at intervals b Continuous recording c Sound wave only 29 What is a digital seismometer? a Device that records numbers of movement b Sound recorder c Camera 30 What is a disadvantage of digital signals? a Misses data between samples b Too continuous c Too large 31 What is one advantage of digital signals? a Easy to store and edit b Cannot be stored c Too noisy 32 . What does sampling rate mean? a How often a signal is recorded b Sound level c Brightness 33 What happens with a higher sampling rate? a Larger file size b Smaller file size c Less detail 34 What system do computers use? a Binary b Decimal c Roman numerals 35 What numbers are used in binary? a 0 and 1 b 1 and 2 c 2 and 3 36 What is a bit? a One binary digit b A byte c A file 37 How many bits are in a byte? a Eight b Ten c Two 38 What is a megabyte? a One million bytes b One hundred bytes c Ten bytes 39 What is a gigabyte? a One billion bytes b One thousand bytes c One hundred bytes 40 What is a terabyte? a One trillion bytes b One million bytes c One thousand bytes 41 How do analog telephones transmit sound? a Convert sound to electronic signals b Use light c Use paper 42 What do mobile phones convert sound into? a Digital data b Ink c Light only 43 How is mobile phone data transmitted? a Microwaves b Water c Ink 44 What are pixels? a Small units that form images b Sound waves c Letters 45 What determines a pixel’s color? a Bytes of information b Sound c Light waves only 46 What happens when more pixels are used? a Larger file size b Smaller file size c No change 47 What is digital media made of? a Numbers b Ink c Sound 48 What is one use of servers? a Store and provide data remotely b Print papers c Draw pictures 49 What is encryption? a Hiding information in code b Drawing images c Printing text 50 What is modern communication based on? a Digital technology b Smoke signals c Letters

Science - Topic 7, Lessons 1 & 2

Froggy Jumps

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Science - Topic 7, Lessons 1 & 2Version en ligne

par Kerry Ben-Jacob

What is information technology?

What does software refer to?

When did electronic computers begin to develop?

What is IT hardware compared to in early history?

What is an example of local hardware?

What allows you to access data stored elsewhere?

What were early long-distance communication methods?

How many main types of modern transmissions are used today?

What do computers process more easily?

What is noise in a signal?

Why are digital signals less affected by noise?

What is bandwidth?

What is a benefit of digital signals?

What is an electronic telegraph used for?

What is a wave pulse?

Who invented the telephone?

What does a microphone do?

What are electromagnetic signals?

When was the first radio signal sent?

How fast do electromagnetic signals travel?

What type of waves do mobile phones use?

What type of waves do submarines use?

What do fiber optic cables use?

What is an analog signal?

What is an example of an analog device?

What is an advantage of analog signals?

What is a disadvantage of analog signals?

What is a digital signal?

What is a digital seismometer?

What is a disadvantage of digital signals?

What is one advantage of digital signals?

. What does sampling rate mean?

What happens with a higher sampling rate?

What system do computers use?

What numbers are used in binary?

What is a bit?

How many bits are in a byte?

What is a megabyte?

What is a gigabyte?

What is a terabyte?

How do analog telephones transmit sound?

What do mobile phones convert sound into?

How is mobile phone data transmitted?

What are pixels?

What determines a pixel’s color?

What happens when more pixels are used?

What is digital media made of?

What is one use of servers?

What is encryption?

What is modern communication based on?