Scientific Measurement
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is measurement? | a quantity that has a # and unit
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| What is accuracy? | correctness
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| What is precision? | repeatability
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| What is scientific notation? | makes very small or large #s manageable, coefficient between 1-10.
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| Rules | +/-: exponents must be the same
x: add exponents
division: subtract exponents
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| What are significant figures? | in measurement all digits that are known plus the last digit
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| What determines if a digit is significant? Rules! | 1. All nonzero digits are significant
2. All zeros between nonzero digits (sandwich zeros) are significant
3. Leading zeros are NOT significant
4. Trailing zeros: significant if there is a decimal in the # NOT significant, if there is no decimal
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| What is error? | experimental value-accepted value
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| What is percent error? | Error/accepted value x 100= __/100=_
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| What is SI? | the metric system that was originally established in france
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| What are the base units? | meter, kilogram, the kelvin, the second, and the mole
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| What determines if a digit is significant? Rules! | 1. All nonzero digits are significant
2. All zeros between nonzero digits (sandwich zeros) are significant
3. Leading zeros are NOT significant
4. Trailing zeros: significant if there is a decimal in the # NOT significant, if there is no decimal
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| What is SI? | the revised metric system that was originally established in france
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| What are the base units? | meter, kilogram, the kelvin, the second, and the mole
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| What are the derived units? | bass units are the foundation
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| What is mass? | contrast with weight, which is amount of force due to gravity
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| What is volume? | a derived unit; comes from a combination of units 1mL=1cm to the 3rd power (or cc)
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| What is weight? | the amount of gravitational pull on an object
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| Kelvin conversion | K=C+273
C=K-273
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| What is a conversion factor? | a ratio of equivalent measurement, and is equal to 1
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| What is dimensional analysis? | a way to analyze and solve a problem using the units (dimensions) of the measurement
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| What is density? | the ratio of the mass of an object to its volume. Density=mass/volume
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Created by:
dwigmans13
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