Types of data: images, sound and video

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Which statement about photos is correct?

A A photo is data that a digital system saves as a picture file

B A photo is not data, so it cannot be saved on a computer

2. Which file would most likely hold a song?

A song.mp3

B song.jpg

3. Which file would most likely hold a short video clip?

A clip.mp4

B clip.txt

4. What is a file?

A A machine that plays sounds and videos

B A named chunk of stored data

5. What does the end part of a file name, like .png or .wav, tell us?

A How many people have opened the file

B The file type, which shows what kind of data is inside

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1photo.jpg		Aclip.mp4
2song.mp3		Bdrawing.png
3A video file stores moving pictures and sound together as data		CImages, sound and video are all types of data, and a digital system saves each one as a file.
4The ending of a file name tells you the file type		DAn audio file that stores sound data
5Open my song.jpg to hear the music		EA picture file that stores image data
6Pictures and videos are not data, so they are not stored as files		FA .jpg file is a picture file, not an audio file. Music should be in an audio file like song.mp3.

Definitions

file

Fill in the Blanks

Complete each line of code by filling in the missing parts.

photo.___ # a picture file

song.___ # an audio file

clip.___ # a video file

# Pictures and sounds are saved as a ____

clip.mp4 # this is a _____ file

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A picture = "beach.mp3"

B sound = "wave.mp3"

C video = "surf.mp4"

D print(picture, sound, video)

Question 2

A image_file = "dog.png"

B audio_file = "bark.wav"

C video_file = "play.mp3"

D print(video_file)

Question 3

A print("jpg is an image")

B print("mp3 is audio")

C print("mp4 is audio")

Question 4

A name = "holiday"

B ext = ".mp4"

C file = name + ext

D print("Video: " file)

Question 5

A photos = ["a.jpg", "b.png"]

B for p in photos

C print("Image:", p)

Answer Key

Types of data: images, sound and video

Section A: Quick Questions

A — A photo is data that a digital system saves as a picture file

A — song.mp3

A — clip.mp4

B — A named chunk of stored data

B — The file type, which shows what kind of data is inside

Section B: Match the Pairs

photo.jpg → A picture file that stores image data

song.mp3 → An audio file that stores sound data

A video file stores moving pictures and sound together as data → clip.mp4

The ending of a file name tells you the file type → drawing.png

Open my song.jpg to hear the music → A .jpg file is a picture file, not an audio file. Music should be in an audio file like song.mp3.

Pictures and videos are not data, so they are not stored as files → Images, sound and video are all types of data, and a digital system saves each one as a file.

Section C: Definitions

file — A named chunk of stored data. Pictures, sounds and videos are all data that a digital system saves as files, such as photo.jpg, song.mp3 or clip.mp4.

Section D: Fill in the Blanks

photo.jpg
# a picture file

song.mp3
# an audio file

clip.mp4
# a video file

# Pictures and sounds are saved as a file

clip.mp4 # this is a video file

Section E: Spot the Error

A — A picture file should end in .jpg or .png. The .mp3 ending is for audio files, so it should be "beach.jpg".

C — A video file should end in .mp4. The .mp3 ending is for audio, so the line should be video_file = "play.mp4".

C — An .mp4 file is a video file, not an audio file. The line should say "mp4 is video".

D — The + is missing, so Python cannot join the text and the file name. It should be print("Video: " + file).

B — A for loop line must end with a colon. It should be for p in photos: