6.9.21 - Experimental Design

What is a factor that is measured for change in an experiment?

• control
• constant
• independent variable
• dependent variable

What is the factor that an experimenter changes on purpose?

• Dependent Variable
• Independent Variable
• Constant
• Control

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 affect of salt water on the the height of blades of grass?

The above question is an example of:

• Hypothesis

• Conclusion

• Procedures

• Testable Question

What is the affect of salt water on the the height of blades of grass?

What is the independent variable in the above question?

• salt water

• height

• average

• affect

What is an if....then statement that predicts the outcome of an experiment or how the Independent variable effects the dependent variable?

• Conclusion
• Materials
• Hypothesis
• Problem

Students used various temperatures of water to see which one dissolved candy faster. 
What was the Independent Variable?

• Amount of Candy
• Amount of Water
• Temperature of Water
• Time for Candy to Dissolve

Students wanted to see if the type of material affected the temperature after being placed under a heat lamp for 10 minutes.

What is the dependent variable for this investigation?

• Type of material (rocks, sand etc)

• Temperature after 10 minutes

• Time under the lamp

• Heat lamp, amount of material

If plants receive more water, the number of leaves will increase. 
This is an example of 

• Testable Question
• Hypothesis
• Variables
• None of the above