26.3. C http://www.ck12.org
26.3 C
carbohydrate
Biochemical compound such as sugar, starch, or cellulose that contains oxygen in addition to carbon and
hydrogen.
catalyst
Substance that increases the rate of a chemical reaction but is not changed or used up in the reaction.
cellular respiration
Process in which the cells of living things break down glucose with oxygen to produce carbon dioxide, water,
and energy.
Charles’s law
Gas law stating that, if the pressure of a gas is held constant, increasing its temperature increases its volume.
chemical bond
Force of attraction between atoms or ions that occurs when atoms share or transfer valence electrons.
chemical change
Change in matter that occurs when matter changes chemically into an entirely different substance with differ-
ent chemical properties.
chemical energy
Energy that is stored in the bonds between atoms that make up compounds.
chemical equation
Symbolic representation of a chemical reaction.
chemical formula
Symbol of a chemical compound using element symbols and subscripts that shows the ratio of atoms in the
compound.
chemical property
Property of matter that can be measured or observed only when matter changes to a different substance.
chemical reaction
Process in which some substances, called reactants, change chemically into different substances, called prod-
ucts.
chemistry
Study of the structure, properties, and interactions of matter, usually at a small scale such as atoms and
molecules.
colloid
Homogeneous mixture in which the particles are large enough to reflect light but too small to settle or filter
out of the mixture.
combustion engine
Chemical reaction in which a substance reacts quickly with oxygen, producing carbon dioxide, water, and
energy; commonly called burning.
combustion reaction
Chemical reaction in which a substance reacts quickly with oxygen, producing carbon dioxide, water, and
energy; commonly called burning.
compound
Unique substance that forms when two or more elements combine chemically.
compound machine
Machine that consists of more than one simple machine.
concave
Curving inward like the inside of a bowl.