Life on this planet would not be possible without water. Usually we think water as a liquid. Wateris

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Life on this planet would not be possible without water. Usually we think water as a liquid. Wateris important in another form, as a solid, as ice. Water is in the air, too, as a gas that we cannot see. Liquids,solids and gases are the three natural states of matter.
50. Which word means the same as matter?
(A) form
(B) balance
(C) cycle
(D) substance
(E) part

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