

1. 
Identify the precision unit of the scale below. 





A. 
1 oz 
B. 
0.3 oz 


C. 
0.5 oz 
D. 
0.25 oz 


Hint 


2. 
Identify the precision unit of the thermometer below. 





A. 
5°F 
B. 
1°F 


C. 
10°F 
D. 
0.5°F 


Hint 


3. 
Identify the length of the pencil using significant digits. 





A. 
18 cm 
B. 
18.15 cm 


C. 
18.05 cm 
D. 
18.2 cm 


Hint 


4. 
The temperature at the core of the sun is estimated to be over 15,000,000 degrees Celsius. How many significant digits are in this measurement? 


A. 
15 
B. 
6 


C. 
2 
D. 
8 


Hint 


5. 
Maurice Greene of the United States won the 100meter run in the 2000 Olympics with a time of 9.87 seconds. How many significant digits are in this measurement? 


A. 
9 
B. 
3 


C. 
7 
D. 
8 


Hint 


