1.2 Experimental Design
This variable is unchanging throughout an experiment.
Constant
This is how CORRECT a number is
accuracy
0.000110
1.5 x 10^5
150,000
How many ounces are in 20 pounds?
(1 pound = 16 ounces)
320 oz
This variable is what provides the data we analyze. It is graphed on the Y-axis.
Dependent Variable
This is how CONSISTENT a number is
precise
101.00
5
1.5 x 10^-3
0.0015
How many inches are in 1 mile?
(1 mile = 5,280 feet; 1 foot = 12 inches)
63,360 inches
Using your five sense to gather information is called _____________.
observations
The SI unit for time is __________.
seconds
The number 100 has one significant figure. What type of zeros are the ones that are not counted in this number?
trailing zeros
120,000
1.2 x 10^5
How many liters are in 1 gallon of milk?
(1 gallon = 16 cups; 1 cup = 237 mL)
3.79 liters
Using prior knowledge to draw conclusions is called __________.
inference
21.59 L = _____ mL
21,590 mL
Complete the following problem and present your answer with the correct number of significant figures:
1.234 x 51 = ??
63
0.000 000 000 000 023
2.3 x 10^-14
After a nice dinner you enjoy a pound cake for dessert. What would be the name of this dessert in grams?
(1 pound = 454,000 mg)
454 grams
This variable is graphed on the x-axis when graphing data from an experiment.
independent variable
How many meters are in 1 kilometer?
1,000 meters
Complete the following mathematical equation and provide your answer with the correct number of significant figures:
1.234 - 0.5 = ??
0.7
Does presenting a number in scientific notation increase accuracy, precision, both, or neither?
Neither! This is just a simpler way to present a number.
If you go to school for 180 days each year and each day is 7 hours long, how many minutes are spent in school in one year?
75,600 minutes