This Science quiz is called 'Light' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.
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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.
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The Moon does not produce any light - it only reflects the light of the Sun
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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
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Light travels faster than anything else - huge distances in space are described as 'light years'. Light travels the 150,000,000 kilometers from the Sun to the Earth in about eight minutes - can you imagine how far it could travel in a year?
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Metal, concrete and wood are opaque materials that do not transmit light (let light pass through them)
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When a beam of light shines on a glass prism, the light is refracted into its different colors, showing a 'rainbow' band of colors on the nearest white surfaces
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This interesting effect is caused by the refraction of light in the water
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Ultraviolet (UV) light is visible to some insects and animals. Bumblebees can see UV light, for example
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Visible, or 'white' light does not include the color black. The colors 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
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The color we see when we look at objects is the color that is reflected by that object - all other colors are absorbed
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Modern submarines have replaced mirrors with prisms which can also magnify the reflections
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