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Light from a candle flame travels in straight lines.


As a part of their study of Science, children in KS2 will look at light. This quiz is about various aspects of light such as sources of light, how light travels and how reflection and refraction occur.

Light, or illumination, is a form of energy that travels in waves, like sound. Light is a fascinating topic to investigate in science lessons. You can find different sources of light, such as a candle or the Sun. You can also study reflection by looking how mirrors affect light. Refraction is something else you can look at. Refraction is when light 'bends' as it passes through different materials like water or glass. The light we can see, which is called visible light, is part of the electromagnetic spectrum. The electromagnetic spectrum includes radio waves, microwaves and x-rays.

Can you name some sources of light? Do you know which materials are good for reflection? See how much you've learned about light by trying this quiz.

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Visible light contains many colours. Which of the following is not one of these colours?
Visible, or 'white' light does not include the colour black. The colours of visible light are those of the rainbow (red, orange, yellow, green, blue, indigo, violet). Objects look black when they absorb all of the light shining on them
How will a beam of light shining on a glass prism behave?
It will be refracted
It will be completely reflected
It will be completely absorbed
It will not be changed at all, instead being perfectly transmitted
When a beam of light shines on a glass prism, the light is refracted into its different colours, showing a 'rainbow' band of colours on the nearest white surfaces
Which of these is not a source of light?
A candle flame
The Sun
The Moon
A torch
The Moon does not produce any light - it only reflects the light of the Sun
How fast does light travel?
120 kilometres per hour
3,000 kilometres per hour
3,000 kilometres per second
300,000 kilometres per second
Light travels faster than anything else - huge distances in space are described as 'light years'. Light travels the 150,000,000 kilometres from the Sun to the Earth in about eight minutes - can you imagine how far it could travel in a year?
Imagine a candle flame. Light from the candle flame travels in which direction?
In arcs
In straight lines
In random lines
All of the above
Light always travels in straight lines - we know this because a beam of light cannot curve around an object. If you hold a book between your eyes and the candle flame, you will not be able to see the flame - its light cannot travel through or around the book
There are forms of light which are invisible to the human eye. Which of these is an example?
Dark matter
Ultraviolet (UV) light is visible to some insects and animals. Bumblebees can see UV light, for example
Light travels slightly more slowly through air than through space. It is slowed down a little bit more by glass and which of the following?
Metal, concrete and wood are opaque materials that do not transmit light (let light pass through them)
If you half fill a clear glass with water and place a straw in the glass, how does the straw appear when you look at it carefully?
It appears normal
It seems to change colour
It appears bent or broken
It disappears completely
This interesting effect is caused by the refraction of light in the water
A submarine's periscope allows someone on the boat to see objects that are above the water. How is this possible?
Light reflecting off the object curves as it enters the periscope
Light reflecting off the object is transmitted as it enters the periscope
Mirrors within the periscope reflect the light, enabling it to change direction
Periscope is another name for window
Modern submarines have replaced mirrors with prisms which can also magnify the reflections
Why does a green apple look green?
It absorbs green light, but reflects the other colours
It reflects green light, but absorbs all of the other colours
It absorbs green light, but transmits all of the other colours
It transmits all of the light
The colour we see when we look at objects is the colour that is reflected by that object - all other colours are absorbed


Author:  Sheri Smith

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