Measurement & Significant Figures

Which is NOT a fundamental unit of the metric system?

• Miles per hour

• Meter

• Kilograms

• Seconds

Which metric prefix means "hundredth"?

• Nano

• Centi

• Giga

• Milli

Why do we say that inexact numbers have uncertainty in them? (This was only barely touched on, so think outside the video too)

Say you get a measurement of 2.573 cm from a person using the rules of measurement described here.  Using what you just learned, describe the ruler they used to take that measurement.

Which number sometimes does NOT count as a significant zero

• 2

• All numbers always count as significant digits

• 0

• 1

Which number below has 3 significant figures?

• 0.01

• 1.022

• 2.30

• 400

How many significant figures would your answer have in the following problem?
  8.72 cm x 4.622 cm

• 7

• 4

• 3

Round this off to 2 significant figures:

859

• 860

• 86

• 900

• 85

Write your own addition or subtraction problem here and include the correct answer.  Your two numbers need to have a different number or places after the decimal.

If you had to explain this video to a friend who hadn't watched it, how would you summarize it?