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Andy
Which of the following is NOT a chemical reaction?
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Andy
The correct order for food passing through the digestive system is?
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Andy
The nutrients needed for energy are?
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Andy
What is mainly absorbed in the large intestine?
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Andy
Where is most digested food absorbed?
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Andy
Which nutrient cannot be digested?
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Andy
Another name for burning is:
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Andy
How long did fossil fuels take to form?
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Andy
If 100g of copper oxide is formed when 80g of copper reacts with oxygen, what mass of oxygen was needed in the reaction?
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Andy
In chemical reactions, the new substances made are called?
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Andy
What is one of the reasons for the greenhouse effect?
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Andy
What is wrong with this chemical equation? methane + oxygen = carbon dioxide + water
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Andy
What sort of reaction happens when magnesium oxide is made by burning magnesium in air?
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Andy
When a piece of carbon burns in air, its mass goes down. This is because:
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