Experimental Designs

What is the factor that an experimenter changes on purpose?

• Dependent Variable
• Independent Variable
• Constant
• Control

A summary of the experiment that includes whether hypothesis was right or wrong

• Hypothesis
• Results
• Conclusion
• Independent Variable

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

What is the effect of salt water on the average of the 3 tallest blades of grass?
The above question is an example of:

• Hypothesis
• Conclusion
• Experiment
• Problem

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

What is the part of the experiment that contains the independent variable?

• control group
• experimental group
• hypothesis
• dependent variable

What are the number of times each level of the independent variable is tested?

• constants
• control 
• repeated trials
• dependent variable

An explanation of why something occurs in the natural world

• theory
• law
• hypothesis
• predicition

2 ways that scientific investigations can be retested are:

• measurement and control
• repetition and replication
• defining a problem and hypothesizing
• concluding and analyzing