1.2.2 2025 - Images & Sound

What is a pixel in a digital image?

• A single square or dot of color in a digital image

• A large block of color

• A line in a digital image

• A circle in a digital image

What TWO things does increasing color depth do to an image?

• Increases the number and accuracy of colors

• Increases the file size

• Reduces the number and accuracy of colors

• Reduces file size

What is image resolution?

• The height and width of an image in pixels

• The number of colors in an image

• The file size of an image

• The speed of loading an image

What is the formula to calculate an image's file size?

• (Pixels high * Pixels wide) * Color depth

• (Pixels high + Pixels wide) / Color depth

• (Pixels high - Pixels wide) * Color depth

• (Pixels high / Pixels wide) + Color depth

What is a sample in an audio file?

• An individual snippet of sound

• A large block of sound

• A continuous wave

• A silent pause

What does sample frequency/rate measure?

• The number of samples per second of digital audio

• The loudness of the audio

• The length of the audio file

• The pitch of the sound

How does increasing sample frequency/rate affect an audio file?

• Increases quality and file size

• Decreases quality

• Reduces the number of samples

• Makes the audio silent

What is sample depth in audio?

• The accuracy of each amplitude measurement per sample

• The length of the audio file

• The speed of sound

• The volume of the audio

How does increasing sample depth affect an audio file?

• Increases quality and file size

• Decreases quality

• Reduces the number of samples

• Makes the audio silent

What is bit rate in digital audio?

• How many bits are used per second

• The length of the audio file

• The speed of sound

• The volume of the audio