Worksheet 1: 8/22/19
Key information:
 UNITS UNITS UNITS
 1 cm3 = 1 mL
 Significant figures
Equations:
 K = ℃ + 273.15
 ºF = 9/5 (ºC) + 32
Practice Problems:
1. What are the SI unit and abbreviation of the following measurements?
Mass –
Length –
Time –
Temperature –
Amount of substance –
2. What is a significant figure?
3. How many significant figures are in the following?
a) 100.2365
b) 400
c) 23 Oreos
d) 0.000000000000001
e) 100000000000000
f) 14.00
g) 26 people in the room
4. What qualifies a “zero” to be significant?
5. Convert the following temperatures.
a) 75 ℉ = ________ ℃
b) 20 ℃ = ________ ℉
c) 47 ℃ = ________ K
d) 82 ℉ = ________ K
6. What is a derived unit?
7. Give some examples of derived units. Why are each considered a derived unit.
8. What is the definition of each of the following?
Kilo? _____________
Mili? ______________
Centi? ______________
9. Explain the rules of significant figures in your own words.