Independent Variables
Stu is testing what Sharpie color stays on your skin the longest. What is his independent variable?
Sharpie color
I will test water, hand sanitizer, and diet coke to see which substance is best at removing sharpie. What is my dependent variable (what will I measure?).
How much Sharpie ink is left
What is your best guess at the result of your experiment at the beginning of your study?
What is the HYPOTHESIS?
Lucy wants to see which glue type will stick wood together the best. The independent variable is?
Glue type
How many independent variables are there in an experiment?
ONE
We will test different species of crab to see which has the strongest claws. My independent variable is...
Species of crab
What is a Dependent variable?
The variable that is measured and affected by the change in the independent variable
What needs to be constant in an experiment?
Anything that is not the independent or dependent variable.
I am watering plants with different amounts of water and measuring their growth. What is the independent variable?
How much water I give the plants
I am watering plants with different amounts of water and measuring their growth. What is the dependent variable?
Plant Growth
What do scientists do to present their data?
Show the data in a GRAPH
I am observing candles with different types of wax to see how fast they melt. What is my IV?
Wax type
I want to see how different hours of sleep affect student test scores. What is the dependent variable?
Student test scores.
True or false, scientific theories can change based on new data
True