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Science vocabulary 2

unit 2 vocab

TermDefinition
Lesson 1: Matter Definition:Anything that has Mass and takes up space
Mass Definition: A measure of the amount of matter in an object
Weight Definition: A measure of the gravitational force exerted on an object in the universe.
Volume Definition: The amount of space that an object takes up or occupies
Density Definition: The ration of the mass of a substance to the volume of a substance
Lesson 2: Physical Property Definition: A characteristic of substance that can be observed & measured without changing identity's substance
Chemical Property Definition: A property that defines a substances ability to form a new substance
Lesson 3: Physical Change Definition: A change of matter from 1 form to another without a change in chemical properties
Chemical Change Definition: A change that occurs when one or more substances change into entirely new substances with different properties.
Law of Conservation of Mass Definition: The law that states the mass can not be created or destroyed in ordinary and physical and chemical changes.
Lesson 4: Solid Definition: Strong forces of attraction holds particles together in a fixed position, - Highest density
Liquid Definition: Weak forces of attraction between particles hold them together but not in a fixed position, - Lower density
Gas Definition: The force of attraction between particles is very weak so they are free to move around, - Lowest density
Lesson 5: Atom Definition: The smallest unit of an element that maintains the properties of that element.
Element Definition: Are broadly classified as metals, nonmetals, or metalloids.
Compound Definition: Like water are pure substances because every molecule is identical
Mixture Definition: A combination of 2 or more substances that have been combined physically.
Pure substances Definition: Made up of one type of particle
Heterogeneous Definition: Does not have a uniform composition
Homogenous Definition: Has a uniform Composition
Lesson 6: Electron Definition:Has a negative charge
Nucleus Definition: Atoms central region which is made up of protons & neutrons.
Proton Definition: A subatomic particle that has a positive charge located in the nucleus. The number of protons is the atomic numbers which determines the identity of an element.
Neutron Definition: Has no charge and is located in the nucleus of an atom
Electron Cloud Definition: A region around the nucleus of an atom where electrons are likely to be found
Atomic number Definition: The number of protons in the nucleus of an atom; the atomic number is the same for all atoms an element.
Mass Number Definition: The sum of the numbers of protons and neutrons in the nucleus of an atom.
Lesson 7: Periodic Table Definition: An arrangement of the elements in the order of their atomic numbers such that elements with similar properties fall in the same column or group
Chemical Symbol Definition: A 1- 2- 3- letter abbreviation of the name of an element
Average atomic mass Definition: The weighted average of the masses of all naturally occurring isotopes of an element
Metal Definition: Conduct heal & electricity well An element that is shiny
Nonmetal Definition: An element that conducts heat and electricity poorly
Metaloid Definition: Have same properties of metals and some of nonmetals
Group Definition: A group is also known as a family (vertical Column)
Period Definition: ( Horizontal Row) Element in a period do not have similar properties
Created by: Marisa.c
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