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Vocabulary-WWW Act.

1st Semester Science Vocabulary

Independent Variable The part of the experiment that is tested. There is only 1 and it is what the scientist changes.
Dependent Variable The end result in the experiment. There is only 1 and it is what gets measured.
Density The amount of mass per unit volume of an object. It is Mass/Volume. How "stuffed" something is.
Safety Goggles Protective eyewear that surrounds the eyes in order to prevent hazardous materials from entering.
Constant All the things that are kept the same in an experiment.You should have at least 3 constants.
Atom The smallest unit of an element that has all the properties of that element.
Nucleus The tiny, very dense, positively charged region in the center of an atom. All the mass, which comes from the protons and neutrons, is here.
Electron Shell/Cloud The regions around the nucleus of and atom where the electrons are found.
Atomic Number The number of protons in one atom of an element. Determines the identity of an atom.
Atomic Mass The average mass of the protons and the neutrons in an element.
Speed How fast something is moving. It is equal to Distance/Time.
Mass The amount of matter in an object.
Inertia An object's resistance to a change in motion. The subject of Newton's First Law of Motion.
Velocity The speed of an object in a particular direction.
Acceleration A change in velocity (a change in speed or direction of motion).
Chemical Symbol This represents the name of an element in the periodic table. It has a capital letter and 0-2 lowercase letters.
Chemical Formula This represents the chemical names of substances. It combines chemicals symbols to show the elements in a substance.
Chemical Equation This combines chemical formulas to show us which substances react and which substances are formed in a chemical reaction.
Compound Molecule This is a substance composed of more than one element that are chemically combined.
Periodic Table of Elements A chart of all the elements in the Universe.
Created by: p0605656