Units and Measurements
The abbreviation for the International Unit System?
What is SI?
The range a coefficient has to be between.
What is 1-9?
How close a measured value is to an accepted value
What is accuracy?
All known digits + one estimated digit
What is a significant figure?
You measure the volume of a standard 1.0 L bottle of water as 0.91287 L. You measure it again as 1.10 L. Which measurement is more precise?
What is 0.91287 L ?
(Difference of 0.08713)
The base unit for mass
kilogram (kg)
Write 5421.89 in scientific notation.
You are playing in a basketball game. You take three shots. All three shots are almost identical and make it into the hoop. This is an example of ___ accuracy and ___ precision.
What is high accuracy and high precision?
Count the number of significant figures in 0.493
What are 3 sig. figs.?
You are measuring the length of a piece of string as 0.093 m, 0.0983 m, 0.101 m and 0.08942 m. The true length of the string is 1.00 m. What type of accuracy and precision is it?
Round the sum of these measurements to the appropriate umber of sig figs.
What is high accuracy, high precision and what is 0.38 m?
The four base units we are focusing on
What is time, length, mass, temperature?
Write 0.0003410 in scientific notation.
What is 3.140 x 10-4?
You measure a set of values of 4.8 kg, 5.1kg, and 5.25 kg. These measurements are ___
What is precise?
Rule #BLANK: All final zeros to the right of the decimal are significant
What is Rule #2?
Your classmate writes his measurements incorrectly and needs help calculating the sum of them measurements together. Your classmate's measurements are 490001111.3894 x 104 L and 4900099933 x103 L. Help your classmate write it correctly in scientific notation and add them together.
What is 9.80011105 × 1012 L ?
Unit defined as a combination of base units
What is a derived unit?
5000.3 - 30.0098 = ? Write the difference in scientific notation.
What is 4.9703 x 103 ?
(4970.2902 in scientific notation)
You measure the mass of an item to be 30.045 g. The label of the item says that it is 31.0 g. Calculate the percent error.
What is 3.08%?
(3.40 x 104) + (8.793 x 103) rounded to two sig. figs.
What is 4.3?
Find the value with the least amount of sig. figs:
A. 2390 g
B. 2390. g
C. 2390.000 g
D. 0.0002390 g
E. 0.02390 g
Convert the value with the least amount of sig figs to scientific notation.
What is A and what is 2.39 x 103?
The SI Unit prefix rules
What is prefixes cannot be combined and the set of prefixes is universal?
(4.091298 x 109) / (3.9012 x 10-7) =
What is 1.0487281 x 1016 ?
You measure a volume of water to be 43.009 L. The standard bottle of the sample of water reads (4.51 x 10^1) L. The error and percent error is ___.
What is error of of -2.091 L and percent error of 6.43%?
(2.07 x 103) L x (3.0 x 102) L rounded to the appropriate amount of sig. figs.
What is 6.2 x 105 L?
The teacher instructs you to find the error and percent error of your volume measurements of 3.30 L, 3.298 L, and 3.31120 L for a standard 3.30 L bottle of water. (HINT: Find the average of the three volume measurements)
What is error of 0.00306667 L and percent error of 0.092929393% ?
Work:
3.30 L + 3.298 L + 3.31120 L / 3
= 9.9092 L / 3
= 3.30306667 L
Error = 3.30306667 L-3.30 L = 0.00306667 L
Percent Error=(0.00306667 L/3.30L) *100= 0.092929393%