WorksheetsRepresenting image and Sound
Total questions: 16
Worksheet time: 9mins
What is the smallest representable part of an image?
Pixel
Bit depth
Sample
Resolution
What are bitmaps made up of?
Pixels
Bit depth
Samples
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
How many colours can a bitmap using 2-bit colour depth contain?
2
4
8
16
How many colours can a bitmap using 4-bit colour depth contain?
2
4
8
16
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
How is the file size of an image calculated?
Width in pixels * height in pixels
Number of pixels in image * colour depth
Number of pixels squared
Sample rate * sample resolution * length in seconds
A bitmap image of 10 by 10 pixels using a colour dept of 8 bits would have a file size of around:
100 bytes
800 bytes
400 bytes
80 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
Sound waves must be samples to create digital sound. A sample is...
a measure of amplitude at a point in time
the number of samples taken per second
the file size of an image
When recording sound, the number of samples recorded per second is called the:
sample rate
sample resolution
colour depth
File size
To calculate the size of a sound file:
colour depth * resolution
sample rate * sample resolution * length in seconds
number of samples * sample rate
sample resolution squared
A 10-second sound recorded at 1000 Hz and 8-bit sample resolution will have a file size of...
10 KB
10 B
10,000 KB
10,000 B
Increasing the sample rate of a recording will result in...
Higher-quality sound recording
Increased file size
Better compression
Higher colour depth
Increased amplitude
An image with only 3 colours could be stored using what minimum colour depth?
2 bit
3 bit
4 bit
1 bit
