Measurement & Significant Figures Part 1

Which is NOT a fundamental unit of the metric system?

• Miles per hour

• Seconds

• Kilogram

• Meter

Which metric prefix means "hundredth"?

• Deca

• Milli

• Centi

• Deci

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 figure (or digit)?

• All numbers always count as significant digits

• 0

• 2

• 1

Which number below has 3 significant figures?

• 400

• 1.022

• 2.30

• 0.01