Worksheetsgrade 4 , con 3
Total questions: 20
Worksheet time: 10mins
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.
the light lamp.
eyes.
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.
Light travels in ....... lines in the form of waves.
curved
zigzag
straight
circular
When light rays hit an object, all the following sentences are correct, except.....
some of this rays is absorbed by the object.
some of this rays is bounced off the object.
some of this rays may go through the object.
all of this rays are absorbed by the object.
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.
A firefly is not a bird, but it is a type of......
amphibians.
lizards.
beetles.
reptiles.
Which of the following is not a reason for fireflies to produce a flash light?............
To attract a mate.
For communication.
To warn off from predators.
To hear in the dark.
Changing the pattern of lighting up in a firefly is an example of....... adaptation(s).
structural and behavioral
physical and behavioral
only structural
only behavioral
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.
touch.
Sense organs collect information and send signals to........for processing and understanding.
hands
legs
brain
stomach
All the following signals are information that the eyes receive, except.....
green traffic light.
fire alarm.
signal fires.
rescue flare.
Which of the following communications depend on the sense of sight only ?
Watch tv
Flashing lights of fireflies
Echolocation
Using the cell phone
