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15
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Why can we not see anything in a completely dark place?
Because no light enters our eyes.
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15
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Why is light important for us?
Light brightens our world and makes it visible.
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What must enter our eyes for us to see an object?
Light must enter our eyes for us to see an object.
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How do we see buildings and roads at night?
Light from bulbs and street lamps hits the buildings and roads, is reflected, and enters our eyes.
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What happens when there is no reflected light from objects?
We cannot see the objects.
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How does the brain help us see?
The eyes send the image to the brain, and the brain interprets what we see.
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Which animals can produce their own light?
Fireflies and most jellyfish can produce their own light.
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monster
Reset all scores!
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gift
Win 25 points!
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fairy
Take points!
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25
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thief
Give points!
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Give two examples of non-luminous objects.
Food and color pencils are non-luminous objects.
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eraser
Reset score!
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rocket
Go to first place!
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fairy
Take points!
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25
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thief
Give points!
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What are artificial light sources?
Artificial light sources are light sources made by humans.
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What are the main light sources at night?
Electric bulbs and street lamps are the main light sources at night.
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Give two examples of artificial light sources that do not use electricity.
A lighted candle and a campfire are artificial light sources that do not use electricity.
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banana
Go to last place!
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shark
Other team loses 20 points!
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fairy
Take points!
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25
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lifesaver
Give 20 points!
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15
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Why can we see the rays of sunlight through the trees?
Because light travels in a straight line.
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What are objects that produce their own light called?
Objects that produce their own light are called light sources or luminous objects.
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