Sig Figs
How many sig figs are in the number 480?
2
Write 4,100 in scientific notation.
4.1 x 10^3
Anthony’s dog Bo lives to be 35 years old in dog years. How many days old was Bo in human time?
(Note: 1 Human Year = 7 Dog Years)
1825 days
The SI Unit for mass
kilogram
These prefixes are used in front so SI Units to change the value of a unit.
Metric Prefixes
When do zeroes get counted when calculating sig figs?
When they are sandwich or trailing with a decimal present.
Will the exponent in the following number be positive or negative? 0.009834
Negative
Convert 159 lbs to kg.
Report to the correct number of sig figs.
72.3 kg
What would you use to measure the mass of an object?
A triple or quadruple beam balance.
Derived Units
How many significant figures in 0.0050060?
5
How many digits can belong in front of the decimal when using scientific notation.
One
Where does the starting unit always go when converting and why?
To the bottom of the next conversion factor to cancel out the units.
What tool is used to measure volume?
Graduated Cylinder
The amount of matter in an object that takes up a certain amount of space is defined as an objects...
Density
What NEVER count as sig figs?
leading and trailing zeroes without a decimal present
How do you determine the value of exponent to use?
Count the number of decimal places that was moved.
In the lab, John mistakenly weighs out 6.706 g of NaCl, table salt for his experiment; he has to report his answer in milligrams, mg. Correct John’s error.
Report your answer in scientific notation.
6.706 x 103
When reading a graduated cylinder you should always read from...
The bottom of the meniscus.
This method is used to measure the volume of irregular shaped objects
Water displacement
Solve the operation and report your answer to the correct number of sig figs.
2.6789 x 320 =
860
Why do scientists use scientific notation?
It makes very large and very small numbers manageable.
How many kilometers can be found in 150 yards?
report your answer to the correct sig figs
0.14 m
What is the volume in liters of a 65.0 g dice that has a density of 2.780 g/mL?
Report your answer to the correct number of sig figs.
0.0234 L
Scientist use this standardized system to communicate measurements universally accross the world.
International System of Units