How images are made of numbers
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Are digital images made up of pixels?
2. Does each pixel have a colour value?
3. Does RGB stand for red, green and blue?
4. Do more pixels usually mean higher resolution?
5. Are pixel colours stored as binary numbers?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1Pixel | AResolution | |
| 2RGB | BBinary numbers | |
| 3How images sharpen with more pixels | CA tiny square of colour that makes up an image | |
| 4How pixel colours are stored by computers | DWrong - pixel colours are stored as binary numbers | |
| 5Images have no pixels at all | EWrong - images are made of many pixels | |
| 6Pixel colours are stored as plain text | FThe red, green and blue values that create a pixel's colour |
C
Definitions
Pixel
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
Images are made of ______
2.
Each pixel has a ______ value
3.
Colours are stored using ___ values
4.
More pixels give higher __________
5.
Pixel colours are stored in ______
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
Images have no pixels
B
Each pixel has a colour
C
Colours are stored in binary
Question 2
A
Pixels make up an image
B
Colour data means nothing
C
RGB stores colour values
Question 3
A
Each pixel has a colour
B
RGB stores colour values
C
Pixels are stored as text
Question 4
A
Images are made of pixels
B
Each pixel has RGB values
C
More pixels increase detail
D
More pixels reduce resolution
Question 5
A
RGB never stores colour
B
Pixels store colour data
C
Binary stores each value
D
More pixels mean higher res
Answer Key
How images are made of numbers
Section A: Quick Questions
Q1
A — Yes
Q2
A — Yes
Q3
B — Yes
Q4
B — Yes
Q5
A — Yes
Section B: Match the Pairs
Q1
Pixel → A tiny square of colour that makes up an image
Q2
RGB → The red, green and blue values that create a pixel's colour
Q3
How images sharpen with more pixels → Resolution
Q4
How pixel colours are stored by computers → Binary numbers
Q5
Images have no pixels at all → Wrong - images are made of many pixels
Q6
Pixel colours are stored as plain text → Wrong - pixel colours are stored as binary numbers
Section C: Definitions
Q1
Pixel — A tiny square of colour that images are built from, stored as RGB numbers in binary.Section D: Fill in the Blanks
Q1
Images are made of pixelsQ2
Each pixel has a colour valueQ3
Colours are stored using RGB valuesQ4
More pixels give higher resolutionQ5
Pixel colours are stored in binarySection E: Spot the Error
Q1
A — Images do have pixels - they're made up of many of them.
Q2
B — Colour data isn't meaningless - it defines each pixel's colour.
Q3
C — Pixel colours are stored as binary numbers, not text.
Q4
D — More pixels actually increase resolution, not reduce it.
Q5
A — RGB does store colour - each pixel's colour is RGB values.