WorksheetsNGHS GCSE SOUND AND IMAGES
Total questions: 22
Worksheet time: 12mins
Name
Class
Date
1.
What is a sampling rate?
a)
How many samples are taken a second
b)
The amount of characters in a data set
c)
The amount of pixels in an image
d)
The frequency
2.
If i had a higher sampling rate my piece of audio would take up
a)
More Space
b)
Less Space
3.
96khz would be __ hz
a)
9,600
b)
96,000
c)
960
d)
96
4.
What is meant by the resolution of an image?
a)
The number of pixels in an image
b)
The number of bits in each pixel
5.
The higher the resolution, the higher the
a)
File size
b)
Colour depth
c)
Frequency
d)
Binary
6.
If my sample rate is low the quality of the sound will be.....
a)
Poor quality
b)
High quality
7.
Define the term 'sampling'.
a)
Snapshots of sound are taken at regular intervals
b)
The number of samples taken each second
c)
The number of bits used per second of audio
d)
The number of bits available for each clip
8.
Define the term 'sample rate'.
a)
Snapshots of sound are taken as the wave cannot be represented as a series of continuous changes.
b)
The number of samples taken each second
c)
The number of bits used per second of audio
d)
The number of bits available for each clip
9.
What affects the quality of an audio clip?
a)
Its amplitude
b)
The number of pixels in the sound
c)
Its sample rate
10.
What sample rate is used for CD quality sound?
a)
44,100 Hz
b)
88,200 Hz
c)
22,100Hz
d)
8000 Hz
11.
The height of a sound wave is called its amplitude.
a)
True
b)
False
12.
If you increase the bit depth of an audio file then you increase thequality? (1-4)
a)
False
b)
True
13.
What is meant by Colour Depth? (4-6)
a)
Number of pixels in the image
b)
The number of colours available for each pixel
c)
How pixelated the image is
14.
If you increase the colour depth then the file size will decrease? (4-6)
a)
True
b)
False
15.
How many colours can be represented with a 4 bit colour depth? (7-9)
a)
2
b)
4
c)
16
d)
256
16.
What is a pixel?
a)
Picture element - the small dots that make up an image.
b)
How an image is stored on the computer.
c)
A type of image
d)
A special type of photograph
17.
What is metadata
a)
It is very large data
b)
It is the data that is stored with every file which gives information about the file
c)
It is data that is compressed
18.
What Metadata is stored with an Image File?
a)
image size, bit depth (colour type), date/time, location, camera type, camera settings
b)
Sampling rate, bit depth, metadata
c)
Colour, resolution, who took the picture
19.
What does colour depth mean?
a)
It refers to the number of bits used to represent the colour.
b)
It refers to how deep the colours go
c)
it refers to the number of bytes in the colours
20.
How many colours do we get from 2 bits
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
21.
How many colours do we get from 3 bits?
a)
2 colours
b)
4 colours
c)
8 colours
d)
24 colours
22.
The higher the colour depth, the _________the image file size.
a)
Smaller
b)
Larger
100 %
