Chemistry

What sort of change happens to a head of lettuce when you cut it in half?

More Questions from Chemistry
What do scientists use to help organize the elements?
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What property is a measurement of how hot or cold something is?
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What is the term for rain that contains chemical pollutants?
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What happens to water when it gets close to freezing?
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When wood has been heated to remove almost all volatile gases and leave the carbon, it is called what?
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What symbol appears on the periodic table for the element with the atomic number 22?
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What is an atom that has more electrons than normal referred to as?
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The study of the effects of light on chemical reactions is known as what?
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