IGCSE Computer Science Paper 1 Word Scramble: 3.2 Input and Output Devices (Modules 273–282)
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Word scramble
Unscramble the letters and write each key term on the line.
1
D3 NPERRIT
An output device that builds a solid object from a digital 3D design file by adding material, such as melted plastic, one thin layer at a time.
2
AEPEKRS
An output device that turns an electrical signal into sound. An electromagnet makes a cone vibrate, and the vibrations make sound waves. A DAC first converts digital sound to analogue.
3
OUTCRTAA
An output device that turns a control signal from a processor into physical action, such as a motor turning, a valve opening or a heater switching on, in control systems and robots.
4
USTEILBA TPTUUO EIVECD
Match the result needed (image, print, sound, 3D, movement) and the situation to the device that suits it best, then justify with 'because'.
5
ONSESR
An input device that measures a physical quantity, such as heat or light, from the environment and sends the readings to a computer or microprocessor.
6
TSCCOAUI NSSERO
A sensor that detects sound and measures its level. Used in noise monitoring, burglar alarms and glass-break detection to show how loud a sound is or whether a sound is present.
7
CEAROTECLEMRE
A sensor that measures acceleration (change in speed or direction) and tilt. Used for phone screen rotation, step counters and car airbag impact detection.
8
LOWF RSSNOE
An input device that measures how much liquid or gas moves past a point in a set time (the flow rate). Used in water meters, fuel systems, pipelines and irrigation.
9
ASG OERSNS
An input device that detects the presence or concentration of a particular gas in the air, e.g. in carbon monoxide alarms, gas leak detection, air quality checks and breathalysers.
Answer Key
IGCSE Computer Science Paper 1 · Modules 273–282
1D3 NPERRIT → 3D printer — An output device that builds a solid object from a digital 3D design file by adding material, such as melted plastic, one thin layer at a time.
2AEPEKRS → speaker — An output device that turns an electrical signal into sound. An electromagnet makes a cone vibrate, and the vibrations make sound waves. A DAC first converts digital sound to analogue.
3OUTCRTAA → actuator — An output device that turns a control signal from a processor into physical action, such as a motor turning, a valve opening or a heater switching on, in control systems and robots.
4USTEILBA TPTUUO EIVECD → suitable output device — Match the result needed (image, print, sound, 3D, movement) and the situation to the device that suits it best, then justify with 'because'.
5ONSESR → sensor — An input device that measures a physical quantity, such as heat or light, from the environment and sends the readings to a computer or microprocessor.
6TSCCOAUI NSSERO → acoustic sensor — A sensor that detects sound and measures its level. Used in noise monitoring, burglar alarms and glass-break detection to show how loud a sound is or whether a sound is present.
7CEAROTECLEMRE → accelerometer — A sensor that measures acceleration (change in speed or direction) and tilt. Used for phone screen rotation, step counters and car airbag impact detection.
8LOWF RSSNOE → flow sensor — An input device that measures how much liquid or gas moves past a point in a set time (the flow rate). Used in water meters, fuel systems, pipelines and irrigation.
9ASG OERSNS → gas sensor — An input device that detects the presence or concentration of a particular gas in the air, e.g. in carbon monoxide alarms, gas leak detection, air quality checks and breathalysers.