| How many colours are in the spectrum? |
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| Where do sperm cells get made? |
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| How many different different atoms make up an element? |
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| How many different different atoms make up a compound? |
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| Whats the surname of the person that discovered gravity? |
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| Who discovered electricity? |
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| fuel+oxygen reacted together = Co2+ ? |
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| who came up with the term E=MC squared? |
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| A blue filter only allows ? coulored light. |
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| If you shine white light through a green filter what coulor would the light then be? |
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