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an eye condition in which objects at any distance appear blurry because of the distorted shape of the cornea
the equivalence of the buoyant force on an object and the weight of the fluid displaced by the object
a substance that affects the rate of a chemical reaction without being used up in the reaction
a compound composed of carbon, hydrogen, and oxygen in which the ration of hydrogen to oxygen atoms is 2 : 1
a substance that is made from two or more simpler substances and can be broken down into those simpler substances
the phase change in which a gas or vapor changes directly into a solid without first changing into a liquid
a chemical reaction in which a compound vbeaks down into two or more simpler substances
a field in a region of space that exerts electric forces on charged particles; a field produced by electric charges or by chaging magnetic fields
a property that causes subatomic particles such as protons and electrons to attract or repel one another
the practice of finding ways to use less energy or to use energy more efficently
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