Independent Variables
Mrs. Stewart wants to know what the effect of playing blooket has on students test scores.
The independent variable is
how much blooket a student plays
What is the dependent variable?
Energy levels
True or false: the independent variable is the variable that the scientist measures.
false
If you wanted to test which fertilizer brand works best, what would your independent variable be?
Brand of fertilizer
The variable that the scientist changes
Independent variable
Mrs. Stewart wants to know what effect drinking water has on how far people can run.
What is the independent variable?
How much water the people drink
Mrs. Stewart wants to know which brand of dog food will make dogs live longest.
What is the dependent variable?
Dog lifespan
True or false: A scientist should change only one variable in a well designed experiment.
True
Speed
The variable that the scientist measures
The dependent Variable
Mrs. Stewart wants to know what the impact of caffeine is on her students ability to stay in their seats. What is the independent variable?
Mrs. Stewart wants to know what impact playing video games has on students sleep habits. She measures how long they play video games and then how long they sleep.
What is the dependent variable?
How long they sleep.
True or false: A control group does not get the experimental conditions.
true.
If you wanted to find out what breed of dog learns the fastest, what would your independent variable be?
breed of dog
A logical interpretation based on prior knowledge, a conclusion based on information.
An inference
A drug company is testing their diabetes medication impact on the illness. What is the independent variable?
How much medication
Mrs. Stewart wants to know what brand of bug spray keeps mosquitos off the longest.
What is the dependent variable?
How long the bug spray lasts
False
What would your control group be if you wanted to test which brand of energy drink made kids the most hyper?
The group of kids that didn't have an energy drink
A tentative, testable scientific explanation.
A hypothesis
A scientist wants to know if people are happier if they eat more vegetables.
What is the independent variable?
Amount of vegetables
What is the dependent variable?
mood of teachers
True or false: a placebo is a fake pill that scientists give patients when they are testing medications.
True
What would your control variables be if you wanted to test which brand of fertilizer made plants grow the tallest?
Temperature, pot, light, water answers may vary
Observations that may be quantitative or qualitative.
Data