Pixels and Resolution

Question 1

What is a pixel?

Answer 1

The smallest unit of a digital bitmap image, appearing as a single dot of colour in a grid

Question 2

How are bitmap images made?

Answer 2

They are made from a grid of small square blocks called pixels

Question 3

What is a vector image?

Answer 3

An image type that uses mathematical instructions instead of pixels

Question 4

How is colour stored in a pixel?

Answer 4

Each pixel is assigned a binary code that represents its colour

Question 5

Do all colours have the same binary code?

Answer 5

No, each colour has a unique binary code

Question 6

What is image resolution?

Answer 6

The total number of pixels in an image

Question 7

How do you calculate resolution?

Answer 7

Width x height (in pixels)

Question 8

How does higher resolution affect image quality?

Answer 8

Higher resolution improves image quality because there are more pixels to show detail

Question 9

How does higher resolution affect file size?

Answer 9

Higher resolution increases file size because more pixel data (binary values) must be stored