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Why is the sky blue - Quiz 1

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1) Water vapour, raindrops and ice in clouds do not scatter light at all. That is why clouds appear white - we see all the colors from the sun unaffected by clouds - pure white light.

True
False


2) Light is made up of electromagnetic waves.

True
False


3) When blue light waves try to go straight through an oxygen atom, its light is scattered in all directions because of this collision. This scattered blue light is what makes the sky blue.

True
False


4) True or false ?

Sunsets are red because all the other colors are scattered around (and diluted) so much that only red, orange and yellow light remains visible.

False
True


5) Why are clouds white?

Pick the best (most correct) answer.

Very small water and ice molecules scatter light from the sun very little. This is why clouds appear white - light from the sun is not affected much by clouds.
Large water and ice molecules scatter all light waves equally. Clouds appear white because all color light waves are affected equally.


6) Clouds appear white mainly because the water and water vapour in it absorbs all colors equally.

True
False


7) What color is the ocean on a cloudy, gray day?

Blue
Grey
Black


8) Mars is red because?

Iron is red
Iron particles are red
Rusted iron is red


9) High concentrations of plankton make the ocean appear blue-green.

True
False


10) Mars has a thick atmostphere making it appear red. The earth's thin atmostphere make it appear blue.

True
False



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