6th grade earth science ch. 2: matter
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16 terms
Terms | Definitions |
|---|---|
 matter | anything that has mass and takes up space |
| atoms | the forms or properties of one type of matter differ from those of another type because matter is made up of tiny particles |
| protons | particles that have a positive electric charge |
| neutrons | particles that have no electric charge |
| electrons | particles with a negative electric charge |
| atomic number | the number of protons in an atom |
| compound | atoms of more than one type of element that are chemically bonded together |
| density | measurement of the mass of an object divided by its volume |
| heterogenous mixture | a mixture not mixed evenly and each component retains its own properties |
| homogeneous mixture | a mixture evenly mixed throughout |
| ion | electrically charged atom whose charge results from an atom losing or gaining electrons |
| isotope | atoms of the same element that have different numbers of neutrons |
| mass number | the number of protons plus the number of neutrons in an atom |
| mixture | composed of 2 or more substances that are not chemically combined |
| molecule | group of atoms connected by a covalent bond |
| solution | mixture evenly mixed throughout; also called homogeneous mixture |
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