WorksheetsHow do Digital Images work?
Total questions: 40
Worksheet time: 21mins
Name
Class
Date
1.
What happens when you copy small or low quality image from the Internet and try to enlarge it?
a)
They become pixelated
b)
The resolution is increased
c)
They get sharper
d)
They become pixel rated
2.
Bitmap images are made up of lots of picture elements Also known as . . .
a)
picels
b)
pixels
c)
picxels
d)
pictels
3.
What is the effect of increasing the resolution of an image?
a)
The image has more white
b)
The image gets bigger
c)
The image quality improves
d)
The image gets smaller
4.
Which image has the highest resolution?
a)
8 x 8 pixels
b)
16 x 16 pixels
c)
32 x 32 pixels
d)
64 x 64 pixels
5.
Digital cameras use the term ‘Megapixels‘ (MP). The iPhone 6 has an 8MP camera. What does this mean?
a)
Photos taken have 8,000 pixels
b)
Photos taken have 8 huge pixels
c)
Photos taken have 8 million pixels
d)
Photo taken have 8 x 8 pixels
6.
Inside every pixel there are three coloured lights. These light up in varying brightness to create all other colours. Which are the three coloured lights in each pixel?
a)
Red,
Green, Blue
b)
Green, Yellow,
Blue
c)
Red,
Yellow, Blue
d)
Blue,
Orange, Red
7.
What is the name of the tiny colouted dots that make up a digital image?
a)
Pixels
b)
Pixars
c)
Resolution
d)
Pin Holes
8.
What is the name for the amount of detail that can be captured by a digital camera?
a)
Revolution
b)
Image Quality
c)
Resolution
d)
Pixels
9.
What is an advantage of a vector image?
a)
Images can be scaled up or down with no loss of quality
b)
Individual pixels can be changed, which makes very detailed editing possible
c)
They have a large file size
d)
They look real
10.
Bitmap or Vector?
a)
Bitmap
b)
Vector
11.
Bitmap or Vector?
a)
Bitmap
b)
Vector
12.
Bitmap or Vector?
a)
Bitmap
b)
Vector
13.
Bitmap or Vector?
a)
Bitmap
b)
Vector
14.
Bitmap or Vector?
a)
Bitmap
b)
Vector
15.
Bitmap or Vector?
a)
Bitmap
b)
Vector
16.
Which image type is best used for simple shapes or unrealistic images?
a)
Bitmap
b)
Vector
17.
Which image type is best used for detailed and realistic images?
a)
Bitmap
b)
Vector
18.
Which image type becomes blurred when you zoom in?
a)
Bitmap
b)
Vector
19.
Which image type keeps the same image quality when zoomed in?
a)
Bitmap
b)
Vector
20.
Which image type is often a very large file size?
a)
Bitmap
b)
Vector
21.
Which image types file size does not change significantly when you make it larger?
a)
Bitmap
b)
Vector
22.
Makes the file smaller by deleting parts of the file permanently (forever)
a)
Lossy Compression
b)
Lossless Compression
23.
Makes the file smaller by giving repeated patterns/colours a specific code
a)
Lossy Compression
b)
Lossless Compression
24.
Which file types use Lossy compression?
a)
JPEG, GIF
b)
PNG, BMP
25.
Which file types use Lossless compression?
a)
JPEG, GIF
b)
PNG, BMP
26.
Which of these is an advantage for Lossy compression?
a)
The file size becomes significantly (much) smaller
b)
The file size does not become much smaller than 50%
27.
Which of these is an advantage for Lossless compression?
a)
The file size becomes significantly (much) smaller
b)
The file size does not become much smaller than 50%
28.
Has this been compressed using Lossy or Lossless?
a)
Lossy
b)
Lossless
29.
Has this been compressed using Lossy or Lossless?
a)
Lossy
b)
Lossless
30.
What would you use compression for?
a)
Making an image file smaller
b)
Modifying an image
31.
The image file format BMP is:
a)
Lossy
b)
Lossless
32.
The image file format JPG is:
a)
Lossy
b)
Lossless
33.
The image file format PNG is:
a)
Lossy
b)
Lossless
34.
The image file format GIF is:
a)
Lossy
b)
Lossless
35.
The image file format TIFF is:
a)
Lossy
b)
Lossless
36.
Vector graphics usually have a much larger file size compared to bitmap graphics.
True of False?
True of False?
a)
True
b)
False
37.
Vector format is better for storing logos and posters as they can be easily scaled.
True or False?
True or False?
a)
True
b)
False
38.
A high resolution graphic is high quality. The higher the number of pixels, the higher the quality.
True or False?
True or False?
a)
True
b)
False
39.
Short for picture element; it is a single dot of color.
a)
API
b)
Tree
c)
Node
d)
Pixel
40.
If an image is too big or if there are some parts you don't want to show, you can ____ it.
a)
Crop
b)
Enlarge
100 %
