- Year 10
- AQA
Main memory
I can describe the purpose of RAM, ROM and cache in a device.
- Year 10
- AQA
Main memory
I can describe the purpose of RAM, ROM and cache in a device.
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Lesson details
Key learning points
- RAM is volatile and ROM is non volatile.
- RAM stores data and instructions currently in use.
- ROM stores the start-up/boot-up instructions.
- Cache is used for frequently used instructions.
Keywords
RAM - random access memory — temporary memory used to store data and instructions that the CPU needs while the computer is running
ROM - read-only memory — stores essential instructions needed for the computer to start up and operate
Cache - a small storage location for frequently used instructions
Virtual memory - borrowed storage located in secondary storage, used when the RAM is full
Common misconception
RAM stores data and instructions when a computer is switched off.
RAM is volatile — when power is switched off, the data and instrucions are lost.
To help you plan your year 10 computer science lesson on: Main memory, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 10 computer science lesson on: Main memory, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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Equipment
Pupils do not require any specific equipment for this lesson.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.What is the main function of the control unit in the CPU?
Q2.Which CPU register temporarily stores the results produced during processing?
Q3.Put the following in order of data movement within a computer:
Q4.What type of program imitates real-world processes?
Q5.Why is binary representation important in computers?
Q6.What does a bus do if the CPU wants to send data to memory?
Assessment exit quiz
6 Questions
Q1.Which memory stores data and instructions currently in use?
Q2.What term describes memory that loses its contents when the power is switched off?
Q3.Which of these is an example of non-volatile memory?
Q4.What is the function of ROM in a computer?
Q5.Match each term to its correct description:
temporary storage for current data
stores start-up instructions
small, fast storage for frequent instructions
secondary storage used when RAM is full