Variables
What are the three main variables in a science experiment?
Independent variable, dependent variable, and control variables.
To calculate an average, you first ______ all the numbers.
Add
For “Does playing violent video games increase your heartrate more than non-violent video games?”
Briefly explain how you would design this experiment.
Use a heart rate monitor to measure the heart rate of the same person playing violent video games and non violent video games for the same amount of time.
The variable that you purposely change is called what?
Independent variable.
After adding all the numbers, you divide by what?
The number of numbers you added.
In “Do boys sweat more than girls during P.E.?”
the Dependent variable is…
Amount of sweat
The variable that you measure in an experiment is called what?
Dependent variable.
Round 15.669 to the nearest tenth
15.7
In the experiment “Do students run faster after drinking an energy drink or eating an energy bar?”, what is the independent variable?
Energy drink vs. energy bar.
What is the variable you keep the same called
Control
You are comparing how long glow sticks last in a freezer vs. on a table. What would go on the y-axis?
Time (hours) (depenendent variable)
You are testing whether people make more free throws with a net or without a net. Name ONE control variable.
Answer: Same distance from the hoop, same number of attempts, same height of hoop, or same person.
When creating a bar graph, the dependent variable goes on the ___ axis.
You are comparing how many free throws students make with a net vs. without a net. What would go on the x-axis of a graph?
With net / Without net (independent variable)
Do athletes hold their breath longer after intense exercise than non-athletes?
Identify: