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Year 7 Computing — Storage and memory

Measure information in bits and bytes, work out the bigger units from the smaller ones, and tell memory that forgets from storage that keeps.

Name: ________________________

  1. 1.Primary memory works directly with the processor. Secondary storage keeps things for later. Sort each one.

    Groups: Primary memory · Secondary storage

    • Hard disk
    • CD
    • RAM
    • Memory card
    • ROM
    • Pen drive

  2. 2.Sort each one by whether it still holds your work after the power goes off.

    Groups: Keeps its contents · Loses its contents

    • Memory card
    • Hard disk
    • Pen drive
    • RAM
    • ROM

  3. 3.One megabyte is 1024 kilobytes. A photograph is 2 megabytes. How many kilobytes is that?

  4. 4.You switch the computer off at the wall. Which memory forgets everything it was holding?

    • a) RAM
    • b) The hard disk
    • c) A memory card
    • d) A pen drive

  5. 5.One kilobyte is 1024 bytes. A short note takes 2048 bytes. How many kilobytes is the note?

  6. 6.One byte is made of 8 bits. How many bits are there in 5 bytes?

  7. 7.Which of these units is the largest?

    • a) Gigabyte
    • b) Megabyte
    • c) Byte
    • d) Kilobyte

  8. 8.One byte is made of 8 bits. How many bits are there in 12 bytes?

Answer key — Year 7 Computing — Storage and memory

  1. 1. RAM → Primary memory; Hard disk → Secondary storage; ROM → Primary memory; Pen drive → Secondary storage; Memory card → Secondary storage; CD → Secondary storage
  2. 2. Hard disk → Keeps its contents; RAM → Loses its contents; Pen drive → Keeps its contents; ROM → Keeps its contents; Memory card → Keeps its contents
  3. 3. 2048
  4. 4. a) RAM
  5. 5. 2
  6. 6. 40
  7. 7. a) Gigabyte
  8. 8. 96