Independent Variable
What is the independent variable in an experiment?
This is the variable that is changed or tested.
What is the dependent variable in an experiment?
The variable that we are measuring.
What is the first step of the Scientific method?
observe/identify a problem
In an experiment, this is the variable that stays the exact same.
Constant/Control variable
In this example, what is the Independent variable:
A student wants to test the strength of different types of wood. They will use 3 types of wood and test how much weight they can hold.
The types of wood
In this example, what is the dependent variable:
A student notices that bread stored in the refrigerator stays fresh longer than bread left on the counter. The student wants to test whether temperature affects mold growth
Mold growth on the bread
Which step in the scientific method do you test your hypothesis?
Experiment
In an experiment, this is the variable that is changed or tested.
Independent variable
True or False:
The independent variable is what we measure.
False
True or False:
The dependent variable is what we measure in an experiment.
True
After you test the experiment, what do you do in the scientific method?
Collect and Analyze data
What do you have to do right before experimenting?
Plan and design the experiment
In this example, what is the independent variable:
A student is trying to find out which brand of paper towel is the most absorbent.
brand of paper towel
In this example, what is the dependent variable:
A student is trying to find out which brand of paper towel is the most absorbent.
The amount of liquid absorbed
What is generally the last step of the scientific method?
Conclusion
In an experiment this is the variable that is measured.
Dependent variable
In this hypothesis, what is the independent variable:
If you use crest toothpaste then you will not get cavities because crest toothpaste has anti-cavity ingridiens.
using crest toothpaste
In this hypothesis, what is the dependent variable:
If you excercise for 20 minutes then your heart rate will increase because excercising increases cardio vascular activity.
Heart rate increasing
List the steps of the scientific method in order.
Observe, Question, Hypothesis, Plan, Experiment, Analyze Data, Conclusion
In the bread mold lab, list the independent, dependent and one control variable.
IV(moisture v Dry, Touch v no touch, Dark v Light)
DV(Mold Growth)
Control(bag, bread, water, pipette, cup etc.)
Create a hypothesis using these variables:
IV - types of jackets
DP - Keeps you warm
Background info - winter jackets have more insulation then lite jacket and windbreaks
Teacher will judge each response