grade 4 , con 3 , lesson 1 &2

The eyes of fishing cats glow at night, because their eyes

• emit their own light.

• can reflect light.

• are small in size.

• have narrow pupils.

The sight process occurs as follows

• light falls on the eyes, then reflected to the objects.

• light falls on the objects, then reflected into the eyes.

• sound falls on the ears, then reflected to the objects.

• sound falls on the objects, then reflected into the ears.

The function of the mirror-like membrane in the fishing cat's eyes, looks like the function of

• night vision goggles.

• radio.

• black paper.

• white paper.

In the fishing cat's eyes, the mirror-like membrane is an important structure because it helps them to .................at night.

• sleep

• breathe

• keep their body warm

• hunt a prey

All the following things are considered as light sources, except

• the Sun.

• fire.

• eyes.

• the light lamp.

We can see both the Sun and the moon, because light

• bounces off both of them.

• is emitted from both of them.

• bounces off the Sun and is emitted from the moon

• bounces off the moon and is emitted from the Sun.

The energy which must present to make our eyes able to see the objects around us is ..............energy

• sound

• electric

• light

• magnetic

A shadow of an object is formed because

• light can pass through the object.

• light cannot pass through the object.

• this object is made of glass.

• this object is transparent.

Opaque material............

• allows light to pass through.

• absorbs some of light that falls on it only.

• reflects some of light that falls on it only

• absorbs some of light that falls on it and reflects the other

All of the following are transparent objects, except

• glass.

• water

• paper

• Air.