Experimental Design and Variables

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

• control
• constant
• independent variable
• dependent variable

Tags

NGSS.MS-PS2-2

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 supported or not.

• Hypothesis

• Results

• Conclusion

• Independent Variable

Tags

NGSS.MS-LS2-4

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

• controls
• data
• constants
• independent variables

Tags

CCSS.HSS.IC.B.3

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

• constants

• control

• trials

• dependent variable

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the effect of different levels of salt water on the the growth rate of grass?

What is the independent variable in the above question?

• salt water

• height

• average

• affect

Tags

NGSS.MS-LS1-5

Is deer size related to its heart size?

What is the dependent variable?

• Size of Deer

• Gender of Deer

• Size of its heart

• Age of deer, gender, and height

Identify the control group (click on picture to enlarge)

• Group A- workers given the special juice

• Group B- workers not given the special juice