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science class
words
| Term | Definition |
|---|---|
| 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. |
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T0809945
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