Understanding Pixels and Digital Images

What app did Mike co-found?

• Facebook

• Instagram

• SnapChat

• code.org

What was the first digital image?

• A dog

• A landscape

• A baby picture

• A car

What are the primary colors used in pixels?

• Red, Green, Blue

• Orange, Purple, Green

• Yellow, Blue, Red

• Black, White, Grey

What does a higher pixel density in a smartphone help achieve?

• Longer battery life

• More storage

• Faster processing

• Sharper images

What is the maximum value for each color in an RGB pixel?

• 100

• 300

• 200

• 255

What does the term 'resolution' refer to?

• The speed of the processor

• The battery life of a device

• The number of pixels on a screen

• The size of the screen

How many bits are used to represent one color channel in RGB?

• 8 bits

• 10 bits

• 16 bits

• 12 bits

What file types can you upload to code.org?

• .jpeg, .png

• .svg, .stl

• .webp, .gif

• .html, .doc

How can you make an image darker using RGB values?

• Divide each value by 2

• Multiply each value by 2

• Subtract 50 from each value

• Add 50 to each value

How many BITS are in a BYTE?

• 8

• 4

• 256

• 1,024