Scientific Method
This step of the Scientific Method is when you look at the work of other scientists and read literature about the question you are trying to answer.
research
"If you smoke, then you will develop a risk for cancer." What is the dependent variable in the statement above?
risk for cancer
Name the metric unit for mass.
gram
200m =__________km
200m =_0.2___km
How many variables can be changed in a controlled experiment?
Only ONE variable can be changed in a controlled experiment. If more than one is changed, then the results will be unreliable.
This step of the Scientific Method is when you collect facts about a problem or question.
make observations
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What is one of the control variables?
type of plant, amount of light, amount of water
How many milliliters are in a liter?
1000 (one thousand)
A hectometer is equal to which of the following measurements?
a. 10 cm b. 10 m
c. 100 cm d. 100 m
d. 100 m = 1 hm
True or false. A theory can become a law by repeated experimentation.
False. Theories are hypotheses that have been tested by repeated experimentation. Laws are universally true and directly observable.
What makes a hypothesis become a theory?
experimentation (testing)
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
independent variable
How many centigrams are in a gram?
100 (one hundred)
10,000mL = 10 ____
What is the unit?
Liters
There are 100 of these in a meter.
centimeters
What is the term for a hypothesis that has been tested repeatedly and is supported by evidence?
theory
During an experiment, this type of variable is kept the same in all groups.
control variable
What is the metric unit for time?
second
28 cm = __________ m
28 cm = _0.28_ m
What is the numerical meaning of the prefix "hecto-"?
100 (one hundred)
What is the term for a universal rule that explains how something happens. It is always true.
law
This group in an experiment does not receive the independent variable.
control group
What do you use a triple beam balance to measure? (hint: the answer is not weight.)
mass
5.0 kg =____________dg
5.0 kg =___50,000__dg
This term refers to a universally accepted measurement. The kings foot used to be the universally accepted "foot" for the English system of measurement.
measurement standard