Design Information Transfer
Grade 4 - Science - Building Confidence
For a classroom code, which signal could transfer information using a pattern?
- three short flashlight flashes
- light reflects from the drum and enters the eye
- a louder sound
- a random color with no code
In the harbor warning, what information can this signal communicate: one long and one short flashlight flash?
- the sender's lunch choice without a code
- smaller amplitude
- the pattern can stand for one planned message
- a quieter sound
Which design test best checks a light or sound code for the stage cue?
- assign a different short-long flash pattern to each message
- ask a partner to read the pattern without extra hints
- judge only whether the signal looks interesting
- change every part of the code during the test
Which improvement would make the weather alert easier to understand?
- remove the code key
- make every signal identical
- add clear pauses between message patterns
- light reflects from the guitar and enters the eye
Why can light or sound be used for the team signal?
- signals work without a receiver
- random noise always has one meaning
- only written words can communicate
- patterns of light or sound can be agreed to represent messages
For a museum exhibit, which signal could transfer information using a pattern?
- a louder sound
- three short flashlight flashes
- a silent object with no agreed meaning
- light reflects from the drum and enters the eye
In the bus-line notice, what information can this signal communicate: three short flashlight flashes?
- no message can ever be sent
- the code can send the message yes
- the sender's lunch choice without a code
- a louder sound
Which design test best checks a light or sound code for the garden reminder?
- judge only whether the signal looks interesting
- place sticks close together across the windy side
- ask a partner to read the pattern without extra hints
- change every part of the code during the test
Which improvement would make the library pickup code easier to understand?
- add clear pauses between message patterns
- make every signal identical
- light reflects from the drum and enters the eye
- remove the code key
Why can light or sound be used for the trail message?
- patterns of light or sound can be agreed to represent messages
- random noise always has one meaning
- signals work without a receiver
- waves cannot carry any pattern