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| What is one cause of the decline of the Roman Empire? |
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| What happens if there is a low cobalt level in inmates? |
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| What helps control manic depression? |
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| What are "mating chemicals"? |
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| by using the scanning tunneling microscope |
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| What is water composed of? |
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| two hydrogen atoms and one oxygen atom |
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| How can water be split into hydrogen and oxygen gases? |
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| using an electric current to split something |
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| What causes substances to change form? |
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| Define the problem, collect background information, form a hypothesis, test the hypothesis in an experiment, record data, draw conclusions and retest |
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| possible explanation for an observation |
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| What is a set of tested hypotheses that give an overall explanation (interpretation/why)? |
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| summarizes what happens without telling why |
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| mass is neither created nor destroyed in a chemical change but may change forms |
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| law of conservation of mass |
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| cannot be broken down into a simpler substance |
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| father of modern chemistry, beheaded because of political affiliation (burning/conservation of mass) |
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| involves no numbers (blue sky) |
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| measurement (involves a number and a unit) |
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| amount of space occupied by an object |
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| amount of matter, measure of resistance of an object to change its state of motion |
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| amount of gravitational pull on an object |
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| Mass is constant, but what can change with location? |
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| Where should liquids be read from? |
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| all known digits plus one estimated digit |
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| reproducible measurements |
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| What happens the closer on gets to absolute zero? (theoretical bc it has never been reached) |
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| it gets harder to remove anymore energy |
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| rigid and have fixed shapes |
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| definite volume but not definite shape |
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| no fixed volume or shape and is compressible (can be pushed together) |
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| visibly distinguishable parts |
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| How can mixtures be separated into pure substances? |
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| What is a pure substance? |
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| something that has a constant composition (elements and compounds) |
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| combination of two or more elements in a specific ratio that can be separated by chemical means |
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| rusting, burning (cannot be changed back to original) |
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| differences in volatility (how readily something becomes a gas) |
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| separates due to pigments and colors |
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| listed on the periodic table |
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| What makes a measurement valid? |
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| What is the diameter of a quarter? |
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| What is the average height of an adult man? |
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| What is the mass of a nickel? |
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| What is the mass of a 120 lb person? |
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| What is the volume of a 12 oz can of soda? |
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| Freezing pt of water in F |
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| Freezing pt of water in C |
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| Freezing pt of water in K |
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