← Years 5–6 Data & Information

Types of data: images, sound and video

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.

Part of: 5-6 Digital Technologies Vic Curric - Data, Information and Privacy — Module 3, 7-8 Digital Technologies: Representing data with binary — Module 3, ACARA Digital Technologies Years 5–6 — Representing Data with Numbers — Module 2

Understanding Types of data: images, sound and video in Years 5–6 Data & Information

What it does: The .mp4 file type is used for video, which is saved as a file just like pictures and sounds. The .png ending tells us this file is a picture. The file type shows what kind of data is inside. An .mp3 file stores audio. A .jpg file stores a picture. An .mp4 file stores video. A .txt file stores plain text. A .png file stores an image. A .wav file stores sound. 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.

Common mistakes: A picture file should end in .jpg or .png. The .mp3 ending is for audio files, so it should be "beach.jpg". A video file should end in .mp4. The .mp3 ending is for audio, so the line should be video_file = "play.mp4".

Class: _____________________ · Name: _____________________ · Date: _________

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This module's key terms are also in a printable crossword (Modules 1–10) and word search (Modules 1–20).

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Learning

Duo

Which statement about photos is correct?

A photo is not data, so it cannot be saved on a computerA photo is data that a digital system saves as a picture file

Matches

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.

Applying

Meanings

Term

file

Meaning

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.

Practice

photo.jpg

Testing

Gaps

photo.

Check Answer

Spots

1picture = "beach.mp3"

2sound = "wave.mp3"

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Quick Questions

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

Images are a type of data. A digital system stores a photo as a picture file, such as photo.jpg.

2. Which file would most likely hold a song?

A. song.mp3 ✓

B. song.jpg

An .mp3 file stores audio. A .jpg file stores a picture.

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

A. clip.mp4 ✓

B. clip.txt

An .mp4 file stores video. A .txt file stores plain text.

4. What is a file?

A. A machine that plays sounds and videos

B. A named chunk of stored data ✓

A file is a named chunk of data. Pictures, sounds and videos can all be saved as files.

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 ✓

The end of a file name is the file type. It gives a clue about whether the file holds a picture, sound or video.

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.

Key Term

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.

Fill in the Blanks

1. photo.jpg # a picture file

Hint: Type the common three-letter file type ending for a picture, starting with j

2. song.mp3 # an audio file

Hint: Type the common file type ending for audio: two letters then a number

3. clip.mp4 # a video file

Hint: Type the common file type ending for video: two letters then a number

4. # Pictures and sounds are saved as a file

Hint: Type the word for a named chunk of stored data

5. clip.mp4 # this is a video file

Hint: Type the kind of data that moving pictures with sound make up

Spot the Error

Question 1

A picture = "beach.mp3"

B sound = "wave.mp3"

C video = "surf.mp4"

D print(picture, sound, video)

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

Question 2

A image_file = "dog.png"

B audio_file = "bark.wav"

C video_file = "play.mp3"

D print(video_file)

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

Question 3

A print("jpg is an image")

B print("mp3 is audio")

C print("mp4 is audio")

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

Question 4

A name = "holiday"

B ext = ".mp4"

C file = name + ext

D print("Video: " file)

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

Question 5

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

B for p in photos

C print("Image:", p)

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

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