Year 9 revision

• Computing
• Lower Secondary (Key Stage 3)

Year 9 revision

8

4

2

1

15

1

1

1

1

0

0

0

0

1. 6
2. 7
3. 3
4. 421

A

B

C

D

Which one was correct?

1. A
2. B
3. C
4. D

Stretch what would 312 be?

0	1	1	0
0	1	0	0

+

=

1

1

1

0

0

0

Which one was correct?

1. A
2. B
3. C

Stretch: What would 1 + 1 + 1 + 1 be?

bit
nibble
byte

Match the number of bits to the correct label.

1

8

4

Answer question 5 linking the definition to the correct term.

Stretch: how many kilobytes are in 4 terabytes?

You do

What is fake news?

What reasons might it be harmful?

How do we check if something is accurate?

Spreading misinformation for a reason:

• raise hate
• recruit
• financial

Can result in:

• protests
• anger
• loss of life

How can we check a source?

• Teachers/trusted adults
• Verified websites
• Google

Stretch: is social media a trustworthy source?

Answer question 6, remember write in full sentences, including the why and result

You do

Images are made up of bits of data called pixels. Pixels are the smallest unit of a digital image. Each pixel is a small square that contains a colour.

The combination of pixels creates the whole image.

The number of pixels is called the resolution. The resolution of an image is calculated the same way as the area of a square:

width * height

12 * 19 =  resolution of 228 pixels

12

19