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Send and decode messages using patterns

4th grade (Year 5 in England) · 16 questions · Common Core: NGSS.4-PS4-3 · England: KS2 Computing links, KS2 Y4 Sound

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  1. Question 1

    In Morse code, SNOW is sent as ••• / –• / ––– / •––. How many flashes (dots and dashes) is that altogether?

    Answer

  2. Question 2

    A torch (flashlight) flashes short (•) and long (–) pulses. Use the key to decode the message. Key: S = ••• O = ––– Message: ••• / ––– / •••

    Answer

  3. Question 3

    Why is "SOS" (• • • / – – – / • • •) a good emergency signal?

    • A. It is the longest message possible.
    • B. It is a simple pattern that is easy to send and recognise with light or sound.
    • C. Only ships can understand it.
    • D. It is secret.

  4. Question 4

    In Morse code, TREE is sent as – / •–• / • / •. How many flashes (dots and dashes) is that altogether?

    Answer

  5. Question 5

    A torch (flashlight) flashes short (•) and long (–) pulses. Use the key to decode the message. Key: M = –– O = ––– N = –• Message: –– / ––– / ––– / –•

    Answer

  6. Question 6

    Why is "SOS" (• • • / – – – / • • •) a good emergency signal?

    • A. It is secret.
    • B. It is the longest message possible.
    • C. Only ships can understand it.
    • D. It is a simple pattern that is easy to send and recognise with light or sound.

  7. Question 7

    In Morse code, DOG is sent as –•• / ––– / ––•. How many flashes (dots and dashes) is that altogether?

    Answer

  8. Question 8

    A torch (flashlight) flashes short (•) and long (–) pulses. Use the key to decode the message. Key: S = ••• O = ––– Message: ••• / ––– / •••

    Answer

  9. Question 9

    Why is "SOS" (• • • / – – – / • • •) a good emergency signal?

    • A. It is secret.
    • B. It is a simple pattern that is easy to send and recognise with light or sound.
    • C. Only ships can understand it.
    • D. It is the longest message possible.

  10. Question 10

    In Morse code, DOG is sent as –•• / ––– / ––•. How many flashes (dots and dashes) is that altogether?

    Answer

  11. Question 11

    A torch (flashlight) flashes short (•) and long (–) pulses. Use the key to decode the message. Key: T = – R = •–• E = • Message: – / •–• / • / •

    Answer

  12. Question 12

    A space probe far from Earth sends photos home. How do they travel?

    • A. as coded radio signals
    • B. carried by a rocket
    • C. as sound through space
    • D. by post

  13. Question 13

    In Morse code, DOG is sent as –•• / ––– / ––•. How many flashes (dots and dashes) is that altogether?

    Answer

  14. Question 14

    A torch (flashlight) flashes short (•) and long (–) pulses. Use the key to decode the message. Key: R = •–• A = •– I = •• N = –• Message: •–• / •– / •• / –•

    Answer

  15. Question 15

    A space probe far from Earth sends photos home. How do they travel?

    • A. as sound through space
    • B. as coded radio signals
    • C. carried by a rocket
    • D. by post

  16. Question 16

    In Morse code, TREE is sent as – / •–• / • / •. How many flashes (dots and dashes) is that altogether?

    Answer

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  1. 11
  2. SOS
  3. It is a simple pattern that is easy to send and recognise with light or sound.
  4. 6
  5. MOON
  6. It is a simple pattern that is easy to send and recognise with light or sound.
  7. 9
  8. SOS
  9. It is a simple pattern that is easy to send and recognise with light or sound.
  10. 9
  11. TREE
  12. as coded radio signals
  13. 9
  14. RAIN
  15. as coded radio signals
  16. 6