Lab Safety-Variables Review

Factors kept the same so only one variable is tested.

• Observations

• Controlled variables (constants)

• Control group

• Independent variable

Tags

NGSS.MS-PS2-2

What is the Independent Variable? (Hint: what is intentionally being changed?)

If soil temperatures rise, then plant growth will increase.

• Rising soil temperatures

• Plant growth

• Soil

• Plants

Tags

NGSS.MS-LS1-5

Which of these questions is a testable scientific question?

• How many angels can dance on the head of a pin?

• What is the age of our planet?

• How many ghosts are there in the room?

• Can psychics help you win the lottery every time?

The variable that is intentionally or purposely changed within an experiment is a/an:

• Control variables (constants)

• Observation

• Independent Variable

• Dependent Variable

The factor that may change as a result of the independent variable is:

• Control variables (constants)

• Observation

• Independent Variable

• Dependent Variable

Tags

NGSS.MS-PS2-2

Factors that are all kept the same except for the variable changed:

• Control variables (constants)

• Control group

• Independent Variable

• Dependent Variable

The group that remains the same (the norm). This is used as a comparison to see if the manipulated variable had an effect.

• Control variables (constants)

• Control group

• Independent Variable

• Dependent Variable

A student used a long flowing scarf to tie back hair while working in the lab. Is this safe or unsafe?

• safe

• unsafe

• not sure

A student worked a lab when Mrs. Rettig was not in the room. Is this safe or unsafe?

• safe

• unsafe

• not sure

A student got a replacement test tube for a lab because his had a chip on the rim. Is this safe or unsafe?

• safe

• unsafe

• not sure