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chemisty
sections 1, 2, and 3
Question | Answer |
---|---|
What is matter | Anything that has mass and takes up space. |
what is chemistry | The study of properties and how matter changes |
what is the difference between a chemical and physical change | a chemical change produces new substances with properties different from those of the original substances |
describe volume | the amount of space matter occupies |
what is an element | a pure substance that cannot be broken down into any other substance by a chemical or physical means |
what is a compound | a pure substance made up of 2 or more elements chemically combined in a set ratio |
what is a mixture | elements and compounds are mixed together in the same place but not chemically bonded |
what is weight | a measure of the force of gravity on you |
what is mass | the measurement of the amount of mass on you |
what is the si system | to measure properties of matter (scientist use it) |
what is density | a measurement of how much mass of a substance is contained in a given volume |
what is a substance | a single kind of matter that is pure meaning it always has a specific make-up or composition or a specific set of properties |
what is a physical property | a pure substance that can be observed without changing it into another substance |
what is a chemical change |