On and Off
A computer device wakes up and sleeps when you use the power button.
How computers do this
Power on wakes the computer so it can read input and show output on the screen.
Class 1 to 2beginner10 min2 lessons
By the end you will be able to
- Find a power button on a device with a grown-up
- Know on means the screen shows output data
- Know off means the computer rests and saves power
Finish first
Topic contents
Computer play 1 of 2
Wake up
Grown-up note (read aloud)
Pressing power wakes the computer. The screen lights up and the device is ready for input and output with a grown-up nearby.
- Power starts the computer
- Ask a grown-up to help
Computer play 2 of 2
Sleep time
Grown-up note (read aloud)
When screen time ends, we turn off or sleep the device so the computer rests and saves power.
- Off stops output on screen
- Rest saves computer energy
Practice
Try at home
No answer key here on purpose: these are the questions worth thinking through before you move on. Open one and work it out.
0/2 attemptedPicture check
Tap your answer
Pick the picture that answers the question. A grown-up can read the words.
0/4
4 of 4 questions left.
Finished this topic?
0 of 2 lessons marked done. Marking the topic complete ticks the rest.