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unit 3 vocabulary
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space |
| mass | describes the amount of matter in an object |
| weight | weight a measurement of gravitational force on an object |
| volume | the amount of space that an object takes up or occupies |
| density | a measure of the amount of mass in a given volume |
| physical property | a characteristic of a substance that can be observed or measured without changing the identity of the substance |
| chemical property | describes a substance's ability to change into a new substance with different properties(common chemical properties include flammability and reactivity with substances such as oxygen,water,and acids.) |
| physical change | change that affects one or more physical properties of a substance |
| chemical change | occurs when one or more physical properties of a substance |
| law of conservation of energy | states that energy cannot be created or destroyed.energy can only change from one form to another |
| law of conservation of mass | states that in ordinary chemical and physical changes,mass is not created or destroyed.mass is only transformed into different substances |