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science class

words

TermDefinition
Chemical change Rearranging molecules and atoms yo form a new substance
Physical change occurs when the appearance of a substance changes, but chemically the substance is the same
Atom basic unit of matter that consists of dense central nucleus
Nucleuse central and most important part of an atom or cell
Atomic number number of protons in the nucleus of an atom
Balanced force when the total of all forces on an object equals zero
Unbalanced force when the net force on an object is greater than zero
Speed Distance traveled by an object in a givin amount of time
Velocity an object speed and directionat a givin instant
force push or pull
mass a unified body of matterwith no specific shape
volume amount of space occupied by a three-dimensial object or region of space expression cubic units.
density the quantity of something per unit of measure, especially unit per lenght or volume
Triple beam balance scale Measure mass of an object
Graduated Cylander Accurate measure of volume
Valence Electrons an electron in the outershell of an atom, negative charge
Law of conservation of mass states of the product is equal to the reactant side of an equation of atoms
subscript is the tells the # of type of atom in one molecule.
coefficient tells the number of molecules.
Atomic Mass Is protons and neutrons.
force push or pull
mass a unified body of matterwith no specific shape
volume amount of space occupied by a three-dimensial object or region of space expression cubic units.
density the quantity of something per unit of measure, especially unit per lenght or volume
Triple beam balance scale Measure mass of an object
Graduated Cylander Accurate measure of volume
Valence Electrons an electron in the outershell of an atom, negative charge
subscript is the tells the # of type of atom in one molecule.
coefficient tells the number of molecules.
Atomic Mass Is protons and neutrons.
Created by: T0809945
 

 



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