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WorksheetsScience Year 8
Total questions: 45
Worksheet time: 28mins
What is light?
Form of energy that travels in straight lines
Form of energy that travels in wiggly lines
Not a form of energy and it travels in straight lines
Not a form of energy and it travels in wiggly lines
What is this group of light rays called?
(a)
What is this group of light rays called?
(a)
What is this group of light rays called?
(a)
What is a non-luminous object?
Does not emit its own light
Reflect light
Emits its own light
Does not reflect light
What is a luminous object?
Does not emit its own light
Reflect light
Emits its own light
Does not reflect light
Can a luminous object be natural?
No
Yes
Ignore this (its a mistake)
Ignore this (its a mistake)
Can a luminous object be man-made?
No
Yes
Ignore this (its a mistake)
Ignore this (its a mistake)
Which of these are luminous objects?
The sun
The moon
The stars
Lightning
Which of these are non-luminous objects?
Eyes
Glass
Chair
Mirror
Do light or sound need particles to travel?
Both do
Both dont
Light does, but sound does not
Sound does, but light does not
What is a transparent object?
Allows light to pass through completely
Allows most light to pass through
Allows no light to pass through
Allows little light to pass through
What is a translucent object?
Allows light to pass through completely
Allows most light to pass through
Allows no light to pass through
Allows some light to pass through
What is an opaque object?
Allows light to pass through completely
Allows most light to pass through
Allows no light to pass through
Allows little light to pass through
What are examples of transparent objects?
Glass window
Air
Glass made of glass
Ice
What are examples of translucent objects?
Frosted Glass
Stained Glass
Glass made of glass
Ice
What are examples of opaque objects?
Chair
Desk
Book
Ice
Why and how is a shadow formed?
Light travels in straight lines
Light cannot bend around an object
Light can not travel through opaque objects
Light can not pass through a translucent object
What does the size of the shadow depend on?
Speed
Time
Angle
Distance
What is reflection?
The change of the angle of a light ray
The change of direction of a light ray
The process of creating a shadow
The process of hitting an object
What is light ray A called?
(a)
What is light ray B called?
(a)
What is angle i called?
(a)
What is angle r called?
(a)
What is so special about the angle of incidence and the angle of reflection on a smooth surface?
i > r
i < r
i = r
i - r
What type of reflection is this?
(a)
What type of reflection is this?
(a)
What happens to a reflection if a pebble hits a smooth water surface?
The water ripples cause the reflection to become unclear
It has become an irregular reflection
The surface not smooth anymore
The surface stays the same
How do we see colours?
An object absorbs white light from a luminous object except for the colours that we see
An object absorbs white light from a non-luminous object except for the colours we see
An object absorbs white light from a non-luminous object except for the colours we do not see
An object absorbs white light from a luminous object except for the colours we do not see
What is the white part of the eye?
(a)
What is the coloured ring of muscle called?
(a)
What is the hole in the coloured ring of muscle called?
(a)
What is the hole in the coloured ring of muscle called?
(a)
What does the Sclera do?
Acts as the supporting wall of the eye
Controls the size of the pupil
Lets light in
Stops dust and sweat from entering the eye
Acts as a shutter to stop light from entering. When we blink, it acts like a wiper, removing all the dust and moisturising the eye
What does the Iris do?
Acts as the supporting wall of the eye
Controls the size of the pupil
Lets light in
Stops dust and sweat from entering the eye
Acts as a shutter to stop light from entering. When we blink, it acts like a wiper, removing all the dust and moisturising the eye
What does the Pupil do?
Acts as the supporting wall of the eye
Controls the size of the pupil
Lets light in
Stops dust and sweat from entering the eye
Acts as a shutter to stop light from entering. When we blink, it acts like a wiper, removing all the dust and moisturising the eye
What do the Eyelashes do?
Acts as the supporting wall of the eye
Controls the size of the pupil
Lets light in
Stops dust and sweat from entering the eye
Acts as a shutter to stop light from entering. When we blink, it acts like a wiper, removing all the dust and moisturising the eye
What does the Eyelid do?
Acts as the supporting wall of the eye
Controls the size of the pupil
Lets light in
Stops dust and sweat from entering the eye
Acts as a shutter to stop light from entering. When we blink, it acts like a wiper, removing all the dust and moisturising the eye
What does the cornea do?
Thick layer of transparent cells that protects the eye
Focuses rays on the retina
Controls the shape of the lens so that the eye can focus on near and far objects
Layer of sensitive light cells called rods and cons that change light energy into electrical signals
Carries electrical signals to the brain so that the brain makes sense of the image
What does the lens do?
Thick layer of transparent cells that protects the eye
Focuses rays on the retina
Controls the shape of the lens so that the eye can focus on near and far objects
Layer of sensitive light cells called rods and cons that change light energy into electrical signals
Carries electrical signals to the brain so that the brain makes sense of the image
What do the lens muscles do?
Thick layer of transparent cells that protects the eye
Focuses rays on the retina
Controls the shape of the lens so that the eye can focus on near and far objects
Layer of sensitive light cells called rods and cons that change light energy into electrical signals
Carries electrical signals to the brain so that the brain makes sense of the image
What does the retina do?
Thick layer of transparent cells that protects the eye
Focuses rays on the retina
Controls the shape of the lens so that the eye can focus on near and far objects
Layer of sensitive light cells called rods and cons that change light energy into electrical signals
Carries electrical signals to the brain so that the brain makes sense of the image
What does the optic nerve do?
Thick layer of transparent cells that protects the eye
Focuses rays on the retina
Controls the shape of the lens so that the eye can focus on near and far objects
Layer of sensitive light cells called rods and cons that change light energy into electrical signals
Carries electrical signals to the brain so that the brain makes sense of the image
The front of the eye is made of:
Pupil
Cornea
Iris
Lens
The image formed on the retina is always:
Fake
Inverted
Small
Funny
