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Unit 2 Measurements and Calculations
Terms in this set (42)
left; number; one
when you have a large number, you will move the decimal to the ___________ and the exponent will be the _________________ of times you moved the decimal. There will only be __________ number in front of the decimal.
When you have a small number, you will move the decimal to the __________. The exponent number is still the number of times you moved the decimal but it will be a _________________ number.
If the exponent is positive, move the decimal to the _______________.
If the exponent is negative, move the decimal to the ________.
are quantitative information - in other words they represent quantities
is something that has Magnitude, Size, amount.
Measurments have ____________
the closeness of measurements to the correct or accepted value of the quantity measured. In other words, the measured or calculated values are close to the accepted value.
the closeness of a set of measurements of the same quantity made in the same way. Precise values or calculations are close to one another but not necessarily close to the accepted value.
accurate and precise
In a perfectly done experiment, you would want your measurements to be what?
When measuring, all measurements will consist of all digits known with certainty plus one final digit that is somewhat uncertain (_______________)
All of the numbers - those known with certainty and even the last, uncertain (or estimated) - are considered _____________________.
All non-zero numbers are _______________________.
Zeros between non-zero numbers are _____________________
Leading zeros before before a number are not ____________________.
Trailing zeros after a number are not __________________ unless there's a ___________________ point.
zeros at the end of a number to the right of decimal point are _______________________
multiplication and division
which rule is this?:
the answer is given with as many sig figs as that measurement with the least amount of sig figs.
adding and subtracting
which rule is this?:
the answer can only show as many decimal places as the measurement having the fewest number of digits after the decimal places
Measurements are _______________________ info. We really like quantitative info in science.
There are _______________________ of measurements used in science. These standards are called _______ Units of Measurements.
It's very important to have standards of measurements and to have all people __________ the same standards.
Larger prefix to smaller prefix then number gets _____________________.
Small to large = number gets __________________.
mass and volume
Matter is anything that has ________ and _______________
A property may be a ____________________ that defines an entire set of substances. You can use properties to classify an unknown substances.
extensive or intensive; physical or chemical
There are two categories of properties: ________________ or _________________ and __________________ or ______________________
Properties used to _________________ matter can be classified as
_________________ and __________________
depends on the amount of matter in the sample (mass, volume, calories for example)
depends on the type of matter, not amount (hardness, density, boiling point, color)
The measurement of mass per unit volume of matter also referred to how crowded or packed the particles are.
Density is an ____________and _________________ property
Does not depend on the ______________ of matter present
It's a property that is often used to identify ______________________ substances.
amount of matter in a substance
the force with which the earth's gravity pulls on the substance
The density of water is ___________________
No matter how much or how little you have the density always stays the ________________
If the density of an object is _________ than the density of water it will float.
density = mass/volume
what is the density formula
measures the efficiency of the laboratory experiment. Was a mistake made?
Experimental value - accepted value/ accepted value x 100
what is the formula for percent Error
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