Font size
WorksheetsImages and sound
Total questions: 26
Worksheet time: 13mins
True or False? Compression reduces the size of a file to make it smaller
True
False
Lossy or lossless? This type of compression does not get rid of any data
Lossy
Lossless
Both
Lossy or lossless? This type of compression gets rid of some information
Lossy
Lossless
Both
What is the smallest representable part of an image?
Pixel
Bit depth
Sample
Resolution
How is the resolution of an image calculated?
Width in pixels * height in pixels
Colour depth * number of pixels
Number of pixels squared
Sample rate * sample resolution * length in seconds
Colour depth defines...
How many bits are needed to store each pixel
How many pixels are in an image
The file size of a bitmap image
The sample rate of sound
A bitmap image of 20 by 20 pixels using a colour dept of 8 bits would have a file size of around:
400 bytes
3200 bytes
40 bytes
320 bytes
Sound outside of computers is...
Analogue
Digital
In order for sound to be stored in a computer it must be converted to...
Analogue
Digital
Buddhism
JPEG
When recording sound, the number of samples recorded per second is called the:
sample rate
sample resolution
colour depth
File size
Increasing the sample rate of a recording will result in...
Higher-quality sound recording
Increased file size
Better compression
Higher colour depth
Increased amplitude
Which file type is used for Sound
.MP3
.PNG
.PSD
.DOCX
How many colours can a bitmap using 2-bit colour depth contain?
2
4
8
16
How can sound be stored as it is an
analogue signal not digital?
It is converted
It is compressed
It is extracted
It is adapted
Images on a computer system are made up of thousands of small coloured dots known as:
bits
colour
pixels
vector
A black and white bitmap image will store a 1 for a black pixel and 0 for a white pixel.
True
False
This bitmap image can be represented using how many bits?
30
46
36
32
Images that store data as a set of instructions for drawing a geometric shape are known as:
Bitmap
Vector
PNG
JPEG
