Design Information Transfer
Grade 4 Science Worksheet

Circle the answer.
A class tests a sound code with 10 messages. Partners decode 9 correctly, but mix up "left" and "lift" patterns. What is the best next step?
- keep the code as it is
- make the left and lift patterns more different
- remove the code key
- make all patterns the same length and sound
Code: 1 flash = 1, 2 flashes = 2, long flash = 5. What number is long, flash, flash?
- 7
- 5
- 3
- 52
A code uses 1 flash for A, 2 flashes for B and 3 flashes for C. The receiver keeps mixing up B and C. What is the best fix?
- add a long pause after each letter
- remove the code key
- use one flash for every letter
- flash faster so it takes less time
Code: thumb up = yes, thumb down = no. A friend points a thumb down. What is the answer?
- later
- no
- maybe
- yes
Code: 2 beeps = door open, 4 beeps = door closed. Lee hears 4 beeps. What does it mean?
- the door is locked
- the door is closed
- the alarm is broken
- the door is open


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