Experimental Design

An observation that deals with measurements or numbers.

• quantitative observation

• qualitative observation

• data

• information

Tags

NGSS.MS-PS3-1

This is a possible explanation that is clear and testable.

• Hypothesis

• Observation

• Theory

• Data

Tags

NGSS.HS-LS2-3

NGSS.HS-PS1-2

This is the aspects of the experiment that are kept exactly the same throughout the experiment.

• Independent variables

• Dependent variables

• Control group

Tags

NGSS.MS-PS2-2

This is the variable that is manipulated or changed by the scientist.

• Controlled Variables

• Independent Variable

• Dependent Variable

• Control Group

This is the factor in an experiment that is allowed to change on its own in response to the independent variable.

• Controlled Variables

• Independent Variable

• Dependent Variable

• Control Group

This is the group that is left alone and shows what would normally happen if no experiment was done at all.

• Independent Variable

• Dependent Variable

• Control Group

Mr. S. sets up an experiment to see how the mass of a ball affects the distance it rolls off a ramp.  Identify the independent variable.

• distance traveled by the ball
• height of the ramp
• mass of the ball
• weight of the ball

Tags

NGSS.MS-PS2-2

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy.  Three different sodas were tested. They measured the height of the foam eruption.   What is a controlled variable (constant) for this experiment?

• Brand of soda
• Number of mentos candies used
• Height of foam eruption
• All are controlled variables (constants)

Making a conclusion on the basis of facts and previous knowledge rather than direct observation.

• inferences

• bias

• independent
• dependent

Tags

NGSS.MS-ESS3-4

This scientific variable is graphed on the x-axis. 

• Dependent
• Control Group
• Independent
• Constant