← ACARA Digital Technologies Years 5–6

Explaining what each part does in a sentence

A short sentence that names a part, says its job and how it helps the next part. It uses a starter like 'The CPU is the...' and the word 'because' to explain.

Part of: ACARA Digital Technologies Years 5–6 — Inside Digital Systems — Module 19, ACARA Digital Technologies Years 7–8 — Hardware and Performance — Module 8

Understanding Explaining what each part does in a sentence in ACARA Digital Technologies Years 5–6

What it does: The starter 'The RAM is the... because...' names the part, gives its job, and uses an everyday example (a desk) to explain it. It names a part of a phone, says its job (sends the tap), and says how it helps the next part (the CPU). Short, clear sentences with a starter and 'because' make your explanation easy to follow. A speaker sends information out to you as sound, so it is an output device. A good example explains the job of the part. Roads connect places, just like the motherboard connects parts. The first sentence names the screen, gives its job (output) and explains why. The second does not say what the screen does.

Common mistakes: Showing pictures is the job of the screen, which is an output part. The CPU runs the apps, so the line should say 'The CPU runs the apps.'. Storage is for keeping files, even when the power is off. It should say 'The storage keeps files safe.'.

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Free printable worksheet with full answer key — or add this module to a class and your students practise it interactively.

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This module's key terms are also in a printable crossword (Modules 5–26) and word search (Modules 5–43).

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Learning
Duo
Which sentence describes a part, its job and why, using a good starter?
The CPU is the brain because it runs instructions.CPU brain thing.
Matches
The CPU is a part.
↓
It names the part but does not say its job or how it helps the next part. It has no 'because'.
Applying
Meanings
Term
The CPU is the brain because it runs instructions.
Meaning
A short sentence that names a part, says its job and how it helps the next part. It uses a starter like 'The CPU is the...' and the word 'because' to explain.
Practice
The screen is the output because it shows pictures.
Testing
Gaps
The CPU is the brain it runs
Check Answer
Spots
2The touchscreen is an input.
3The CPU shows the pictures.

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Quick Questions

1. Which sentence describes a part, its job and why, using a good starter?
A. The CPU is the brain because it runs instructions. ✓
B. CPU brain thing.
A good sentence names the part (CPU), says its job (the brain) and uses 'because' to explain why.
2. Which sentence uses the word 'because' to explain a part's job?
A. The RAM is the short-term memory because it holds what the game is using right now. ✓
B. The RAM is a part of the computer.
'Because' links the part to its job. The second sentence names the part but never says what it does.
3. Which sentence says how a part helps the NEXT part?
A. The touchscreen sends your tap to the CPU, so the CPU can decide what to do. ✓
B. The touchscreen is on the front of the phone.
Describing a system means saying how one part helps the next. The first sentence links the touchscreen to the CPU.
4. You are describing a tablet to a friend. Which is the clearer explanation?
A. Storage, it has stuff in it, and photos, and it is also a thing and apps too.
B. The storage is the tablet's filing cabinet because it keeps my photos and apps even when it is off. ✓
Short, clear sentences with a starter and 'because' make your explanation easy to follow.
5. Which sentence correctly says what the speaker does?
A. The speaker is an input device because it turns signals from the console into sound.
B. The speaker is an output device because it turns signals from the console into sound. ✓
A speaker sends information out to you as sound, so it is an output device.

Match the Pairs

The CPU is the brain because it runs instructions. → Names a part (CPU), says its job (runs instructions) and uses 'because' to explain why it is called the brain.
The screen shows the picture so the player can see the game. → Names an output part, says what it does and how that helps the next step: the player sees the game.
Use a sentence starter to name a part and explain its job with 'because' → The RAM is the desk because it holds what the CPU is using now.
Describe a part of a phone and say how it helps the next part → The touchscreen sends my tap to the CPU so the phone can respond.
The CPU is a part. → It names the part but does not say its job or how it helps the next part. It has no 'because'.
The speaker is the storage because it plays the sound out loud. → The job described (playing sound) is an output job, but the sentence calls the speaker storage, so the name and the job do not match.

Key Term

The CPU is the brain because it runs instructions.
A short sentence that names a part, says its job and how it helps the next part. It uses a starter like 'The CPU is the...' and the word 'because' to explain.

Fill in the Blanks

1. The CPU is the brain because it runs instructions.
Hint: Type the word that links the part to the reason for its job.
2. The RAM is the short-term memory because it holds data while the device is on.
Hint: Type the short name of the memory part that holds data while the device is on.
3. The screen is an output device because it shows the picture to the user.
Hint: Type the word for a device that shows results to the user.
4. The storage keeps my saved games even when the console is off.
Hint: Type the part that keeps files and games after the power is off.
5. The motherboard joins the parts together so the console works as one system.
Hint: Type the name of the main circuit board that connects all the parts.

Spot the Error

Question 1
A A phone is a digital system.
B The touchscreen is an input.
C The CPU shows the pictures.
Line C — Showing pictures is the job of the screen, which is an output part. The CPU runs the apps, so the line should say 'The CPU runs the apps.'
Question 2
A A tablet is a digital system.
B The RAM holds data in use.
C The storage loses files fast.
Line C — Storage is for keeping files, even when the power is off. It should say 'The storage keeps files safe.'
Question 3
A A console is a digital system.
B The controller is an input.
C The CPU is the screen because
D it runs game instructions.
Line C — The sentence starter names the wrong part. The CPU is the brain because it runs instructions. The screen is an output part.
Question 4
A A phone has a speaker.
B The speaker is an input part
C It lets us hear the music.
Line B — A speaker sends sound out to us, so it is an output part. An input part sends data in.
Question 5
A I tap a key on my tablet.
B The touchscreen is the input.
C The CPU is the brain because
D it only stores the photos.
Line D — The sentence says why the CPU is the brain, so it must give the CPU's job: working out what to do. Storing photos is the job of storage.

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