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Grade 6 Computer Science — 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.Put these units of information in order, smallest first.

    • Terabyte
    • Byte
    • Megabyte
    • Gigabyte
    • Kilobyte
    • Bit

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

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

  4. 4.Each letter you type takes one byte, and one byte is 8 bits. How many bits does a word of 6 letters take?

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

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

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

    Groups: Primary memory · Secondary storage

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

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

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

  8. 8.One kilobyte is 1024 bytes. How many bytes are there in 3 kilobytes?

Answer key — Grade 6 Computer Science — Storage and memory

  1. 1. 1. Bit 2. Byte 3. Kilobyte 4. Megabyte 5. Gigabyte 6. Terabyte
  2. 2. 2048
  3. 3. 96
  4. 4. 48
  5. 5. d) RAM
  6. 6. RAM → Primary memory; Hard disk → Secondary storage; ROM → Primary memory; Pen drive → Secondary storage; Memory card → Secondary storage; CD → Secondary storage
  7. 7. c) Gigabyte
  8. 8. 3072