concept 1.3

All the following things are considered as light sources, except.............................

• The sun

• Fire

• Eyes

• Light lamp

Fishing cat's eyes shine in the dark.............................

• X

Light travels in straight line ..................................

• X

All of the following are transparent objects, except........................

• Glass

• Water

• Paper

• Air

Reading and writing are common types of communication between......................

• Humans

• Animals

• birds

• Plants

A firefly is not a bird, but it is a type of............................

• amphibians

• lizards

• beetles

• reptiles

……………………. is considered a type of communication used by animals only.

• Writing

• Echolocation

• Reading

• Cell phone

The main source of the light in the earth....................

• Light lamp

• Flashlight

• Sun

• Moon

Opaque objects allow light to pass through and we can see objects through them..............

• X

Cross out the odd word:(Mirror- Cloth- Paper-Wood) ..............

• Mirror

• Cloth

• Paper

• Wood