Density/ Dimensional Analysis
Scientific Notation
Accuracy, Precision, and Certainty
Solving Problems with Significant Figures
Unit Conversions and Derived Units
Potpourri
100

How many seconds are in two days?

31536000 seconds

100
The shortcut method for writing very small numbers or very large numbers.
Scientific Method
100
Difference between accuracy and precision
Accuracy - how close a measurement is to the actual answer Precision - how close a measurement is to other measurements of the same thing
100
What is the rule when multiplying or dividing?
Answer must have the same amount of significant figures as the measurement with the fewest amount of significant figures.
100
Kilo- means...
1,000 times
100

When graphing, what goes on the x-axis and y-axis?

X: Independent variable

Y: Dependent variable

200

Calculate the density of a material that has the mass of 52.457 grams and a volume of 13.5cm3

D= 3.89 g/cm3

200
Example of Scientific notation and Standard notation
229,000 (Standard) 4.73 x 10`3 (Scientific)
200
What number of this measurement is uncertain? 124.8
8
200
What is the rule when adding or subtracting?
The answer must have the same amount of significant figures to the right of decimal point as the measurement with the least amount of significant figures to the right of the decimal point.
200
500 mg = _____ g
0.5 grams
200

What is the equation for percent error?

abs("experimental" - "accepted")/abs("accepted") xx 100


300

The density of silver is 10.49 grams/cm3. If a sample of pure silver has a volume of 12.993 cm3, what is the mass?

M= 136.3 grams

300
245,860,000,000 Place in Scientific Notation
2.4586 x 10`11
300
How many significant figures are in the measurement 30,780 grams?
4
300
8.35 meters x 3.996 meters
33.4 square meters
300
2.5 km = ______ cm
250,000 cm
300

What is this an example of? If I play music to the corn plants, then the corn plants will grow more. 

Hypothesis

400

A runner competed in a 5 mile run. How many yards did she run? (1 mile=1760 yards)

8800 yards

400
2.65 x 10`-12 Standard Notation
.00000000000265
400
How many significant figures are in the measurement 3050.1 grams?
5
400
98.0 pounds - 1.22 pounds
96.8 pounds
400
Calculate the density of an object with the mass of 24.3 grams and the volume of 32.9 mL.
.739 g/mL
400

The ________________ involves a series of steps that are used to investigate a natural occurrence.

Scientific Method
500

Pure gold has a density of 19.32 g/cm3. How large would a piece of gold be if it had a mass of 318.97 grams?

V=16.51cm3

500
What does a negative exponent tell you about a number?
The number is very small.
500

A tree is 70 feet tall. It was measured twice using the same tool. The measurements recorded were: 59.3 feet and 58.9 feet. Are these measurements accurate, precise, or both?

Precise

500
7 centimeters x 1.86 centimeters x 0.002 centimeters
0.03 cubic centimeters
500
What is the volume of an object with the density if 1.25 g/mL and the mass of 281 grams?
225 mL
500

If the accepted value for a density is 1.59 g/cm3, what is the percent error if the error is -0.05 g/cm3?

3.14%

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