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14 Cards in this Set
- Front
- Back
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observing |
usingsenses to obtain information |
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qualitative |
descriptive |
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quantitative |
numerical |
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scientific method |
logical approach for solving problems by observing andcollecting data, formulating & testing hypotheses and formulating theoriessupported by data |
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hypothesis |
a prediction that is basis for testing by experiment |
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SI |
single measurement system agreed to by scientists all overthe world |
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mass |
quantityof matter |
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weight |
measure of gravitational pull on matter |
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volume |
amount of space occupied by an object |
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density |
ratio of mass to volume d=m/v |
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accuracy |
closeness of measurements to an accepted value (ex. bullseye) |
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precision |
numbersclose to each other but not necessarily close to accepted value |
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percentage error |
Experimental value – accepted value/accepted value X 100 |
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significant figure |
consists of all digits known with certainty plus one final digit which is uncertain or estimated Rule 1 All non-zero digits are significant Rule 2 Leading zeros are never significant (zeros to the left) Rule 3 Captive zeros are always significant (zeros in the middle) Rule 4 Trailing zeros are sometimes significant (ZEROS AT THE END)a) They are significant if the number contains a DECIMAL pointb) They are not sig. if the number does not contain a decimal point |
