1.	Identify the precision unit of the ruler below.
		A.	in.	B.	in.
		C.	4 in.	D.	in.
		Hint
	2.	Identify the precision unit of the graduated cylinder below.
		A.	0.5 mL	B.	2 mL
		C.	5 mL	D.	1 mL
		Hint
	3.	Identify the precision unit of the thermometer below.
		A.	1°F	B.	5°F
		C.	0.5°F	D.	10°F
		Hint
	4.	Identify the weight shown on the scale using significant digits.
		A.	8.65 kg	B.	8.7 kg
		C.	8 kg	D.	8.6 kg
		Hint
	5.	Maurice Greene of the United States won the 100-meter run in the 2000 Olympics with a time of 9.87 seconds. How many significant digits are in this measurement?
		A.	7	B.	8
		C.	3	D.	9
		Hint