Dr. Smith has been reading about another scientist’s research in a physics journal. He plans to do these experiments himself and see if he gets the same result.

• Repetition

• Replication

Julie goes to Silver River each week for 4 weeks and collects 5 samples of water to test the pH

• Repetition

• Replication

Tags

NGSS.MS-PS1-2

An environmental group contacts Julie to get her procedures so that they can check her results.

• Repetition

• Replication

Tags

NGSS.MS-ESS3-3

A one time explanation of one observation.

• Hypothesis

• Theory

• Law

Well-proven explanation for a set of observations.

• Hypothesis

• Theory

• Law

Explanation of WHY things are the way they are.

• Hypothesis

• Theory

• Law

Tags

NGSS.HS-ESS1-5

NGSS.HS-ESS2-4

NGSS.HS-LS4-2

Proven description of HOW things are, but does not give a reason why.

• Hypothesis

• Theory

• Law

Tags

NGSS.MS-PS1-5

Can be supported or rejected by a single experiment.

• Hypothesis

• Theory

• Law

DEVELOPED through scientific inquiry process.

• Hypothesis

• Theory

• Law

Tags

NGSS.MS-LS1-5

Ms. Umholtz performs an experiment by comparing the number of drops of tap water that can fit on a penny to the number of drops of soapy water that can fit on a penny. She performs three trials. What is the independent variable?

• Number of drops of tap water

• Number of drops of soapy water

• Type of water used

• Amount of drops that can fit on the penny