buoyancy: The ability to float on or rise up within some liquid or gas.
chemistry: The field of science that deals with the composition, structure and properties of substances and how they interact. Scientists use this knowledge to study unfamiliar substances, to reproduce large quantities of useful substances or to design and create new and useful substances. (about compounds) Chemistry also is used as a term to refer to the recipe of a compound, the way it’s produced or some of its properties. People who work in this field are known as chemists.
compound: (often used as a synonym for chemical) A compound is a substance formed when two or more chemical elements unite (bond) in fixed proportions. For example, water is a compound made of two hydrogen atoms bonded to one oxygen atom. Its chemical symbol is H2O.
concentration: (in chemistry) A measurement of how much of one substance has been dissolved into another.
cubed: (in mathematics) Some number multiplied by itself, and then once again. For instance, 2 cubed is 2 x 2 x 2, or a total of 8.
density: The measure of how condensed some object is, found by dividing its mass by its volume.
dilute: To make something thinner or less concentrated by adding a liquid to it.
dissolve: To turn a solid into a liquid and disperse it into that starting liquid. (For instance, sugar or salt crystals, which are solids, will dissolve into water. Now the crystals are gone and the solution is a fully dispersed mix of the liquid form of the sugar or salt in water.)
egg: A reproductive cell that contains half of the genetic information necessary to form a complete organism. In humans and in many other animals, ovaries produce eggs. When an egg fuses with a sperm, they combine to produce a new cell, called a zygote. This is the first step in the development of a new organism.”
equation: In mathematics, the statement that two quantities are equal. In geometry, equations are often used to determine the shape of a curve or…
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