POS Final Review

The prefix Mega equals

• 1,000

• 1,000,000

• 1,000,000,000

• .001

The prefix micro equals

• .1

• .001

• .000001

• .000000001

2.45 kg equals

• 245 g

• .245 g

• 2,450 g

• 2,450,000 g

In the measurement 2.056 cm, which digit is the estimated digit?

• 2

• 0

• 5

• 6

What is the value of the smallest marking on the graduated cylinder?

• 1 mL

• 2 mL

• .1 mL

• .2 mL

What is the proper reading of the volume in the graduated cylinder?

• 45 mL

• 50.6 mL

• 51.0 mL

• 51 mL

If an object with a volume of 6 mL has a mass of 12 g, what is its density?

• .5 mL/g

• .5 g/mL

• 2 mL/g

• 2 g/mL

In lab, you measured the boiling point of ethanol. Your data for three trials was as follows. Determine if your results are accurate and/or precise.

Trial 1 : 78.1˚C

Trial 2 : 77.9 ˚C

Trial 3 : 78.0˚C

Actual boiling point of ethanol : 78.5˚C

• accurate and precise

• accurate but not precise

• not accurate nor precise

• not accurate but precise

Johnny wakes up one morning. He swallows and thinks, “Man my throat hurts. I think I might have strep throat.” He tells his mom and she calls the doctor. At the doctor appointment, the doctor takes a sample from Johnny’s throat. The sample is sent to the lab. Later that day, the doctor’s office calls Johnny’s house with directions for Johnny to take antibiotics because he has strep throat.

What part of this situation would be an example of a hypothesis?

• "Man my throat hurts."

• "I think I might have strep throat."

• The sample is sent to the lab.

• Johnny has strep.

At which point is potential energy the greatest?

• A

• B

• C

• D