Variables
Variables that are kept the same to ensure only one factor is being tested. Several of these are present in a sound experiment.
Control variables
842 m. to km.
0.842 km.
First two steps in the scientific method.
1. Make an observation.
2. Formulate a hypothesis.
Write 1,500 in Sci. notation
1.5 X 10^3
What is the formula for slope
change in y/change in x
The measurement or result of the experiment.
Dependent variable
1.542 m. to cm.
154.2 cm.
3rd and 4th step in the Scientific Method.
Design an experiment.
Analyze data.
Write 2.3 X 10^4 in standard notation.
23,000
What is the formula for the equation of the line
y=mx+b
Variable that is deliberately manipulated to test for a result.
Independent variable
4,009 ml. to L.
4.009 L
5th step in the Scientific Method
Make a conclusion.
Write 0.000064 in Sci. notation.
6.4 X 10^-5
What would the significance of the y intercept be if you were recording data about plant growth over time
starting height
A researcher tests three brands of batteries by measuring how long each battery powers the same flashlight. She performs five trials for each brand. Why are multiple trials important?
They increase reliability by reducing unusual results.
43.2 grams to centigrams
4,320 Centigrams
What do you do if your experiment completely refuted your hypothesis?
-Make a new one, test again, or change procedures.
Write 1.7 X 10^-7 in standard notation.
0.00000017
Which variable is represented on the x axis
A scientist obtains these results about how temperatures of water affect dissolution times of sugar: 10°C → 180 s; 20°C → 130 s; 30°C → 90 s; 40°C → 55 s. What conclusion could be reached?
As temp increases, the dissolution rate decreases
12.501 HL to Deciliters
12,501 Deciliters
What format is most appropriate for a hypothesis
If/then
An area of land measures 1.5 x 10>15 km by 2.5 x 10>18 km. What would the total area be (use correct sci not)
3.75 x 10>33 km
Using the equation of a line-calculate how many grams would a substance weigh if volume was 100mL and the slope of the line was 1.2g/mL
120 g