grade 4 , con 3 , lesson 4

All of the following are forms of codes, except

• thumb up and down hands.

• faces expressions.

• writing.

• swimming.

When your eyes see a red traffic light, this means that you have to

• increase your speed.

• cross the street.

• keep your speed as it is.

• stop at once.

People use a rescue flare to communicate with each other depending on the sense of

• hearing.

• sight.

• smell.

Sense organs collect information and send signals to ............. for processing and understanding

• hands

• legs

• brain

• touch.

All the following signals are information that the eyes receive, except

• green traffic light.

• fire alarm.

• signal fires.

• rescue flare.

Animals communicate with each other by using different senses.

• TTrue

• Ffalse

Sense organs can decode the information that is sent by the brain.

• True

• False

Expressions on faces are codes that can help people predict our feelings.

• True

• False

Different languages have similar codes.

• True

• False

People use signal fires to communicate over distances of many kilometers.

• TTrue

• FFalse