Main memory
Lesson details
Learning outcome
I can describe the purpose of RAM, ROM and cache in a device.
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.
Teacher tip
Demonstrating how quick it is to send information from one person to another taking on the role of cache levels, RAM and virtual memory can aid understanding.
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
Q6.Place these types of memory in order from fastest to slowest:
To help you plan your 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 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.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
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