REVIEW: Unit Conversion and Sig Fig

Non-zero numbers are ___________ significant

• always

• sometimes

• never

• maybe

Leading zeros (zeros before any non-zero digit) are _____________ significant

• always

• sometimes

• never

• maybe

Trailing zeros (zeros at the end of a number) are ______________ significant

• always

• sometimes

• never

• absolutely

Trailing zeros (zeros at the end of a number) _______ significant when there is a decimal place.

• are

• are not

Trailing zeros (zeros at the end of a number) _________ significant when there is no decimal place

• are

• are not

Captive zeros (zeros in between two non-zero numbers) are __________ significant

• always

• sometimes

• never

• maybe

How many sig figs: 100

• 1

• 3

• 2

• 4

How many sig figs: 21.60

• 3

• 2

• 4

• 1

How many sig figs: 0000.00234

• 5

• 3

• 4

• 9

How many sig figs: 20.002

• 2

• 3

• 4

• 5