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Year 8 Computing > CT term 1 > Flashcards

CT term 1 Flashcards

1
Q

Examples of output devices

A

monitor

printer

speakers

headphones

projector

touch screen

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2
Q

postersize

A

To print or display using only a handful of different tones. Adjust; a slightly crude image

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3
Q

bit

A

A contraction of “Binary Digit”. A bit is the single unit of information in a computer, typically represented as a 0 or 1.

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4
Q

computer

A

A programable electronic device the stores, retrieves and processes data.

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5
Q

examples of computers

A

laptop

mobile phone

smart watch

games console

washing machine

pace maker

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6
Q

example of imput devices

A

keyboard

mouse

microphone

games controller

touch screen

web cam

scanner

graphics tablet

barcode reader

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7
Q

pixel

A

Short for “picture element” it is the fundamental unit of a digital image, typically a tiny square or dot which contains a single point of color of a larger image.

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8
Q

Order of file sizes

A

nibble

byte

kilobyte

megabyte

gigabyte

terabyte

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9
Q

What is ASCII?

A

A binary number representing every letter, number and symbol.

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10
Q

a nimble

A

4 bits

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11
Q

byte

A

a group of 8 bits

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12
Q

16 bytes

A

smiley face

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13
Q

How to add binary numbers?

A

Just like denary numbers (normal number) except instead of ten the number is multiple of two.

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14
Q

Grey scale display

A

Displays black, white, and shades of gray

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15
Q

capture

A

to catch, a capta, captura

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16
Q

retouch

A

To modify the details of an image

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17
Q

air brush

A

to alter an image using specialized software to conceal imperfections

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18
Q

inherit

A

existing in something as a permanent, essential, or characteristic attribute

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19
Q

jiggery-pokery

A

underhanded manipulations or dealings; trickery; dishonest behaviour

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20
Q

built-in

A

forming an integral part of a structure or device, inherent

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21
Q

hefty

A

heavy; big and strong, muscular; of considerable size or amount; robus, puternic, viguros

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22
Q

tunnel vision

A

1 : constriction of the visual field resulting in loss of peripheral vision.

2 : extreme narrowness of viewpoint : narrow-mindedness also : single-minded concentration on one objective.

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23
Q

Dithering

A

A process that makes the transition between shades smoother

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24
Q

desktop

A

on your desk

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25
Why is a desktop better?
more powerful
26
laptop
same parts as a desktop smaller than desktop hard to update mobile/ easy to move
27
tablet
even less parts really small slow processing easy to move/ mobile less memory
28
Network card
Allows computers to access networks Wirelessly Through an ethernet cable
29
Motherboard
backboard connects everything green thing at the back
30
Case/ outside
body
31
CPU
Central Processing Unit Fetches, decodes and executes code. represents brain needs to be kept cool communicates and controls other parts of the computer SSC Faster and more efficient than a hard drive.
32
What happens when a device overheats?
stop working heat up if too much
33
heatsink
takes heat from the computer goes to fan circulates air little radiator
34
RAM
Random Access Memory Short term memory in laptop, but smaller than in desktops 2.38GHz=gigabits per minute Turning it back on means you have to retrieve it from there Temporary storage data Serves as computer's working memory
35
Graphics card
good for gamers expansion card generates output images on a display device
36
Power supply unit(PSU)
Power Unit feeds power to device can't run power to PC- would blow Converts high voltage Alternating current (AC) to low voltage Direct currtent (DC) this i
37
solid state drive
electronic no moving parts SSCs some look like cartriges invented in 1978
38
magnetic tape storage
invened by J. Presper Eckert and John Mauchly created in 1952
39
hard drive
If you open up a hard drive is like a record player invented by Reynold. B. Johnson in 1965 data storage device usually internally stored uses magnetic storage to store and retrieve data has rapidly rotating disks disks coated in magnetic materials disc spins stick magnetically reads data retains the data even when the device is switched off
40
punch card
created by Sony Philips in 1980 or 1994
41
Blue-ray
named after the blue laser used to read the discs in 2000
42
Cloud Storge
invented by Dr. Joseph Carl Robnett Licklider in the 1960s
43
kilobyte
1024 bytes KB
44
Megabyte
1073741824 bytes MB
45
metabytes
a set of data that describes and gives information about other data.
46
Examples of metadata
size=x by y colour=what colours are in the picture date= what date it was taken time= what time it was taken
47
sound
faster than the tides
48
sampling
collection data
49
music sampling rate
44,100 samples a second
50
music sampling
piece of audio from the smallest possible singular measurement of an amplitude stored on a computer up to the largest file a computer can hold
51
longer samples
single sample of a wave form
52
network
a group of two of more computer systems linked together
53
LAN
Local Area Network
54
WAN
Wide Area Network
55
internet
A global network connecting millions of computers, making it possible to exchange information.
56
What is a bitmap?
Representation of an image tiny blocks of colour
57
capturing sounds
Capture and log sounds sample then store in binary
58
Network
Group of two or more connected devices
59
What are the types of networks
Local Area Network= LAN Wide Area network= WAN = example of WAN =Internet
60
What is a server?
A computer providing resources and/ or services.
61
What is a network switch?
Connects devices together Directs data around the network
62
What is a Router?
Device which allows wireless connection to a network.
63
What is eathernet cable?
Used to connect network hardware together.
64
What is a firewall?
A piece of software. Stops unwanted connections to your network.
65
What is a data incription?
A method of changing the original characters in a message. It hides or discusses the message.
66
What is an anti-virus software?
Designed to detect and stop attacks from malware.
67
What is the reason for secure passwords?
It is important for network security. Prevent others from accessing your data
68
What to remember when creating a password?
A combination of small letters capital letters numbers symbols more digits, more secure

Year 8 Computing (3 decks)

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