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| a prediction. Never can be proven |
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| explains observations/data gathered over a period of time. Constantly being tested and retested. |
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| accepted as fact. doesn't offer an explanation of how/why. |
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| a logical approach to problem solving. can be used to solve any problem. Is universally accepted |
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| the science that deals with the structure and composition of substances and the changes the structures undergo due to energy transfers. Everything is this. |
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| are considered pure substances, and are the simplist form of matter that's unique. |
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| two or more elements bound together. Are considered pure substances |
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| two or more different elements and/or compunds physically intermingled. Are not considered pure substances |
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| different types of matter are visible. |
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| One type of matter is visible to the unaided eyes or low-powered microscope |
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anything that has mass and takes up space.
Sound, light, and electricity are NOT this |
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| the number of protons in the nucleus of each atom of a given element |
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| the weighted average of all forms of the element (isotopes) known in nature |
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| represents one specific atom or isotope. Not an average |
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| varying numbers of neutrons in the same element |
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| varying numbers of electrons in the same element |
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| The Law of the Conservation of Mass |
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| the total amount of matter in a closed system remains constant. Whatever you put in is equal to what comes out |
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| states that properties of elements tend to change in a regular pattern when elements are arranged in order of increasing number of protons in their atoms |
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