AP Biology Experimental Design

What is the factor that an experimenter changes on purpose?

• Dependent Variable
• Independent Variable
• Constant
• Control

What is an if....then statement that predicts the outcome of an experiment?

• Conclusion
• Materials
• Hypothesis
• Problem

Tags

NGSS.MS-LS1-5

The part of the experiment that does not contain the independent variable. Used for comparison.

• Control Group
• Experimental Group
• Results
• Data

What are all the things that are kept the same in an experiment?

• controls
• data
• constants
• independent variables

Tags

NGSS.MS-PS2-2

What is the effect of salt water on the average of the height of the 3 tallest blades of grass?
What is the independent variable in the above question?

• salt water
• height
• average
• effect

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the effect of salt water on the average of the height of 3 tallest blades of grass?
What is the dependent variable in the above question?

• the salt water
• effect
• average of the 3 tallest blades of grass
• number of blades of grass

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

"If the forest is clear-cut (cutting down all the trees in an area of forest), then it will result in drier soils because there will not be any trees to protect the soil from sunlight" is an example of:

• a theory
• a hypothesis
• an experimental question
• a conclusion

Tags

NGSS.MS-LS2-1

The number of variables that should be allowed to change in a well designed, controlled experiment is: 

• none
• 1
• 2 or more
• dependent on the type of experiment

Tags

NGSS.MS-PS2-2

The __________________ variable is the variable you are observing and that changes in response to the _________________ variable.

• independent (experimental), dependent
• dependent, independent (experimental)
• dependent, control
• independent (experimental), control

Tags

NGSS.MS-PS2-2

You read that cats will meow more if they eat more ice cream.  You decide to do an experiment to test this hypothesis.  Using your cat for the experiment, you feed your cat 50 cm³ of vanilla ice cream, 100 cm³, and no (0 cm³).  You made sure that during your experiment, you used the same beaker, same brand of ice cream, the same temperature ice cream, and the same procedure for feeding your cat.  Once your cat was finished eating you counted the number of times he meowed in 10 minutes.  You recorded your data in a data table.  
What is the dependent variable (DV) in this experiment?

• The cat
• The amount of ice cream
• The number of meows
• The type of ice cream