Biology

Atom

The basic unit of matter.

Nucleus

The center of an atom.

Electron

Is the negatively charged particle.

Element

Is a pure substance that is made up of only one kind of atom.

Isotopes

Atoms of the same element that have different numbers of neutrons.

Compound

Is a substance formed by a chemical combination of two or more elements in definite compounds.

Ionic Bonds

Is formed when one or more electrons are moved, or transferred from one atom to another.

Covalent Bond

A electron that travels around the nucleic of both atoms.

Molecule

Is the smallest unit of most compounds.

Cohesion

Is the attraction between molecules of the same substance.

Adhesion

Is the attraction between molecules of a different substance.

Solution

Is a mixture in which the molecules of mixed substances are evenly spread out.

Suspension

Mixtures of water and nondissolved materials that do not settle out.

Acids

Is any compounds that release H+ ions in a solution.

Base

A compound that releases hydroxide (OH-) ions in a solution.

Buffers

Weak acids or bases that can react with strong acids or bases to stop sharp, sudden changes in PH.

Carbohydrates

Compounds that are made up of carbon, hydrogen, and oxygen atoms.

Lipids

Macromolecules that generally do not dissolve in water and are made mostly of carbon and hydrogen atoms.

Nucleic Acids

Macromolecules containing hydrogen, oxygen, nitrogen, carbon and phosphorus.

Proteins

Polymers of molecules called amino acids.

Amino Acids

Compounds with an amino group (-NH2) on one end and a carboxyl group on the other end.

Chemical Reactions

Is the process that changes one set of chemicals into another.

Activation Energy

The energy that is needed to get a reaction started.

Catalyst

Is the substance that speeds up the rate of a chemical reaction.

Enzymes

Proteins that act as catalyst in living things.