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40 Cards in this Set
- Front
- Back
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Scientific method
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A logical approach to solving problems by observing & collecting data, formulating hyptheses, testing hypotheses, and formulating theories supported by the data
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Observing
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use of senses to observe info
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System
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A specific portion of matter in a given region of space that has been selected for study during an experiment of observation
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Hypotheses
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testable statement
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Model
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An Explanation of how phenomena occur, how data or events are related
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theory
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A broad generalization that explains a body of facts or phenomena
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Quantity
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Something that has magnitude, size, or amount
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SI
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le syste'me international d'unte's
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Weight
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measure of gravitational pull
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Derived units
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Combination of SI units
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Liter
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1000cm^3
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Density
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M/V
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Length
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l, meter, m, light interval
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mass
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m, kilo, kg
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time
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t, second, s
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temperature
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t, kelvin, K
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Amount of substance
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n, mole, mol
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Electric current
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I, ampere, A
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Luminous intensity
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Iv, candela, cd
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Tera
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T 10^12 (Trillion)
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Giga
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G 10^9 (Billion)
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Mega
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10^6 (M million)
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Kilo
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k 10^3 Thousand
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Hecto
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h 10^2 Hundred
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Deka
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da 10
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Deci
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d 10^-1
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Centi
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c 10^-2
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Micro
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,u 10^-6
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Nano
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n 10^-9
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Pico
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p^-12
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Femto
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f 10^-15
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Atto
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a 10^-18
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Accuracy
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closeness of measurements to the correct or accepted value of the quantity measured
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Precision
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closeness of a set of measurements of the same quantity of measurements made in the same way
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Percent error
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(Value accepted- value experimental)*100
--------------------- Value accepted |
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Significant figures
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All digits known with certainty and 1 final, which is uncertain or estimated
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Adding+Subtracting
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Answer must have same number of digits to the right of the decimal as there are in the measurment having the fewest digits to the right of the decimal point
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Dividing+Multiplying
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Fewest number sig figures
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directly prop
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y
- = k x |
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inversely prop
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xy=k
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