Experimental Design
This is a factor in the experiment that is deliberately changed or manipulated by the scientist.
Independent Variable
True or False: A measurement can be precise but not accurate.
True
How many significant figures are in the number 0.00450?
3
How many milliliters are in 1 liter?
1000 milliliters
What is the first rule when solving dimensional analysis problems?
Write your given
What is the independent variable in an experiment where plant growth is measured with different amounts of water?
Amount of Water
Write this number using scientific notation: 67300000
6.73 x 107
When multiplying 2.34 by 6.7, how many significant figures should the answer have?
2
Convert 5 kilometers to meters.
5,000 meters
What is the rule for significant figures for dimensional analysis problems?
Your answer should be the same number of sig figs as your given/starting value.
What is the dependent variable in an experiment testing the effect of sunlight on plant height?
Plant Height
Does the following data have low precision or high precision: 1.00 g, 1.5 g, 2.5 g, 0.5 g?
low precision
What is the correct way to round the number 3.987 to three significant figures?
3.99
2 decimeters to kilometers
0.0002
Convert 15 miles to kilometers using the conversion factor 1 mile = 1.609 kilometers.
24 km
Identify the independent and dependent variables in an experiment where different fertilizers are tested to see which produces the most flowers on a plant.
Independent variable: Type of fertilizer.
Dependent variable: Number of flowers.
Write 3.2 x 10-5 without using scientific notation.
0.000032
Calculate the sum of 12.11 and 3.5 using the correct number of significant figures.
15.6
Convert 0.75 liters to milliliters.
750 milliliters
How many centuries are in 8,760,000 minutes?
0.167 centuries
The variable that is the standard point for comparison.
Control
A student measures the boiling point. They calculate an average of 100°C in the experiment. The accepted temperature 101.2°C. What is the percent error for this data? Is it accurate?
1.19%, accurate
How many significant figures in the number 2.00370?
6
How many centimeters are in 2.5 meters?
250 centimeters
Calculate the density of a copper coin with the following knowns: Mass of Coin (g) = 25.0, Volume of coin (mL) = 10.5. Determine the density of the copper coins.
2.38 g/mL