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Worksheetsgrade 4 , con 3 , lesson 1 &2
Total questions: 15
Worksheet time: 8mins
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.
.............allows most of light to pass through, while............ Don't pass through it.
Air - glass
Glass-air
Wood-glass
Glasswood
Mirror causes falling light rays to
Pass through it
reflect at the same angle they strick the mirror.
reflect in different directions.
diffuse like that of rough surfaces.
Our eyes,.............
can see through both opaque and transparent objects.
cannot see through both opaque and transparent objects.
can see through opaque objects, but not through transparent objects.
can see through transparent objects, but not through opaque objects.
If there are two sheets, one is made of wood and the other is made of glass,
you can see the glass sheet through the wood sheet.
you cannot see the wood sheet through the glass sheet
you can see the wood sheet through the glass sheet
light can pass through both sheets
Light rays can pass through lenses, so they are made up of
wood
paper
glass
metal.
