Scientific Method
Variables
Variables II
100
What are the steps of the scientific method?
1. Make an Observation 2. As a Question 3. Form a Hypothesis 4. Conduct an Experiment 5. Draw a Conclusion
100
Define the word "variable"
Anything in the experiment that can change.
100
When Mr. Han use more force to throw the ball, the ball traveled further across the room. What is the independent variable? What is the dependent variable?
IV- amount of force DV- distance ball move
200
What do scientist do to test a hypothesis?
Perform an experiment
200
What is an independent variable?
The variable in the experiment that you change to test.
200
When Mr. Han use more force to throw the ball, the ball traveled further across the room. List two control variable for that situation.
style of throw type of ball location point of release
300
What do you do when you make an observation?
use your sense to collect information
300
What is a dependent variable?
The dependent variable is the variable that responds to the independent variable.
300
When John increases the amount of time to study, usually his test scores increase as well. What is the independent variable? What is the dependent variable?
IV- amount of study time DV- test score
400
What's the difference between quantitative and qualitative observation? Give example of both.
QNT- observation using numbers, QL- observation without using numbers.
400
What type of variable represents "cause" and what type of variable represents "effect"?
Independent Variable (cause) -------> Dependent Variable (effect)
400
Mr. Han thinks that the "Quantum" Duracell battery has more energy than the regular Duracell battery. He wants to test out his hypothesis by doing the following experiment. He will use one new "Quantum" battery to power a flashlight and a old regular battery to power a clock. He leaves the flashlight and clock on until it turns itself off. He will record the time. Is this experiment considered a controlled experiment? Explain.
It is not a controlled experiment because there is more than one independent variable.
500
There are 70 students at KCP. Quantitative or qualitative observation? Why?
Quantitative observation because describe something using numbers to quantify.
500
In a drug trial, the group that gets the placebo is which group?
The control group
500
Mr. Han thinks that the "Quantum" Duracell battery has more energy than the regular Duracell battery. He wants to test out his hypothesis by doing the following experiment. He will use one new "Quantum" battery to power a flashlight and a old regular battery to power a clock. He leaves the flashlight and clock on until it turns itself off. He will record the time. How can you make this experiment into a control experiment?
Both batteries are new. Both batteries being used with the same device. Only thing that changes is the type of battery.
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