Revision Self Guided - Y9

• Computing
• Lower Secondary (Key Stage 3)

Y9 Revision Self Guided

Work your way through this interactive guide

Attempt all interactive elements

do not skip through otherwise the revision will not be effective

Photo Editing Skills Recap

Write down every tool you can think of in PhotoPea

What does the layer tool do ?

Layer tool

Helps you organise elements in the file

Which file type is a flattened version of the saved PSD file

1. An MP3 file
2. a JPG file
3. A PDF file
4. A PSD file still

Select and move

Use this to select a layer and move it

Selection tools

Allow you to select regions of the layer to be edited (like deleted or recoloured)

Crop tool

Chops away parts of the image (like scissors would)

Eraser Tool

Deletes areas of a layer like a standard rubber would on paper

Magnifier

Zoom in and out of parts of the image

Do you know which label is right for each tool?

Do you know any useful keyboard shortcuts in Photopea?

Good shortcuts in Photopea

CTRL+C = Copy

CTRL+V = Paste

CTRL+D = Deselect areas

CTRL+Z = Undo last action

Hardware/Software Revision

What is the difference between input and output devices?

List as many input and output devices
using the letter "i" and "o" before each to show you know which is which

INPUT - - - - - - OUTPUT

Secondary storage

Long term storage that is permanent

Store files and programs

Which of these is Primary storage

1. RAM
2. Hard drive
3. CD ROM
4. USB Stick

Which of these is not secondary storage

1. SD Card
2. DVD
3. ROM
4. Hard drive

APPLICATION SOFTWARE

UTILITY SOFTWARE

OPERATING SYSTEM SOFTWARE

Software that performs a generic task

Without this, the computer will not work.  It manages all system resources

Software that maintains device health, maintenance and security

Scratch revision

Exercise

The best way to revise scratch is to run through the basics on the scratch website

Click to Go To Scratch

Try recreate some basic programs like:

• Sprite chasing game - cat and dog
• look over your maze and add another level
• ensure you use a broadcast, a variable and if/else blocks

Image binary revision

How many colours can you represent using 4 bits per pixel?

More bits = more colours

More on images

For more information, videos and explanations of how images are stored on a computer go to

bbc bitesize website

Castle Chattolly Revision

What is meant by the term audience targetting?

Model answer info

Go to BBC BITESIZE to look over this concept

We use this every time we do any graphic design (logos, documents, posters, video, websites etc...)

Vectors vs Bitmaps

Vectors:

Great for scaling

Do not blur

good for maps, logos

Bitmaps

Great for high detail

Like photos

Python Application revision

Advise:

To prepare for the application questions you need to remember:

• Simple python syntax
• including printing, taking inputs, storing variables etc...
• The best way to prepare is to look over the slides your worked on with the code links and tasks
• Here is the link

Loop question advice

You will be asked to write the output to certain loops like the one below:

You would need to write exactly what this would output for the test to score the marks.  So in this example:

0 hey 1 hey 2 hey 3 hey        OR

0 hey, 1 hey, 2 hey, 3 hey

would be correct.  Take your time to enter the answers for these to get them right