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1st Semester Vocabulary - WWW Mrs. Van Wyk's 2nd Period

TermDefinition
Density Density is the measure of how much matter there is in a certain volume. The formula for density is Density = Mass/Volume
Safety goggles Eye protection that is worn in the lab whenever you're working with hazardous chemicals/open flames, or whenever the teacher says so...
Beaker A beaker is a cylindrical glass container used for mixing, stirring, and heating liquids in the lab.
Open-toed shoes, loose hair/clothing, food and drinks These should NEVER be in the lab for safety purposes. Instead, wear closed-toed shoes and remember to tie your hair back.
Graduated cylinder A tall, cylinder used to measure the volume of fluids in the lab.
Proton One of the subatomic particles of the atom, located in the nucleus. It's charge is positive and it counts towards the mass of the atom. Also decides the identity of the atom.
Neutron One of the subatomic particles of the atom, located in the nucleus. It has no charge (neutral), and contributes towards the mass of an atom.
Electron A negatively charged subatomic particle. Orbits around the atom in the electron shells and does not count towards the mass.
Element A pure substance that cannot be separated into simpler substances by physical or chemical means.
Chemical change A change in which a new kind of matter is formed.
Periodic Table A list of all the elements found in the universe. Listed in order by atomic number, the elements are organized in horizontal rows called periods and vertical columns called groups.
Chemical equation A chemical equation uses chemical formulas to represent a chemical change.
Balanced forces Balanced forces occur when 2 or more forces cancel each other out, or the net force is 0. Does not cause a change in motion.
Speed Speed is the distance an object moves in a period of time, or how fast it's moving. It is calculated using this formula: Speed = Distance/Time
Newton's First Law Otherwise known as the Law of Inertia, says objects in motion stay in motion and objects at rest stay at rest unless an unbalanced force acts upon it.
Newton's Third Law Law of action, reaction. It states that for every action there is an equal and opposite reaction.
Unbalanced forces These do cause a change in an object's motion. Unbalanced forces are when 2 or more forces don't cancel each other out/net force is greater than 0.
Acceleration Acceleration is a change in an object's velocity. This means it happens whenever an object speeds up and/or changes direction.
Parallax It is the apparent shift in the position of an object when viewed from two different positions. It's used to measure the distances of objects from earth in space.
Nebula Clouds of gas and dust where stars are formed. Also known as a "stellar nursery".
Created by: 100001523964782
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