Listen to the passage. Choose answers that fit the helpers' job.
Two Helper Tables
At a city park, Inez and Omar help with a maze game. Their tables are 20 big steps apart. A tall hedge stands between them. They cannot see each other's table, but they can hear a hand drum. They need to send two messages without leaving their tables.
They can make a drum from an empty container with a lid. They will tap the lid gently with a hand. One tap will mean “come.” Two quick taps will mean “wait.” They will leave a long pause between messages. They also have a flashlight and cardboard for making a holder.
1.
Which plan best fits the tables behind the hedge?
2.
Which parts can make the drum described in the passage?
3.
Inez wants to send “wait,” then “come.” Which pattern should she tap?
4.
How can Inez check that Omar understood a test message?
Compare the Drum Tests
Use the test notes and graph. A correct message means Omar heard the taps and named the right message.
The helpers test three drums: a cup, a box, and a tub, each with a lid. They stay at the same tables. Inez sends the same five messages with each drum. She uses gentle hand taps each time. Omar records how many messages he names correctly.
5.
How many more messages were correct with the tub than with the cup? more messages
6.
The helpers want at least four correct messages in five tries. Which drum met that goal?
7.
Circle the TWO claims the graph supports.
8.
For a new test, Omar moves close for the cup but far away for the tub. What should the helpers fix?
Design for a New Spot
Use the new clues. Then draw a device and tell how to test it.
Later, the helpers move to two tables beside a clear path. No hedge blocks the view. Nearby music covers the drum taps, but Omar can see Inez's flashlight flashes. They agree that one flash means “come” and two quick flashes mean “wait.” For safety, they aim the light at a card beside Omar, never at his eyes.
9.
Which device best fits the new spot?
10.
The cardboard holder tips over during a test. Omar misses the flashes. What should Inez try next?
11.
Draw your light device for the clear path. Show the flashlight, a holder that will stand up, and the card where the light will shine.
12.
How will you test whether your light device sends a message? Tell what you will do and what your partner will do.
