Practice with Orders of Magnitude

Complete this worksheet without a calculator.

1.	Convert the following:

                                          Meters                              Centimeters                  Kilometers

Earth                                  10^7

Solar System                      10^13

Milky Way Galaxy            10^17

Local Supercluster             10^24
 
Visible Universe                10^26

2.	How many times larger is our galaxy than the solar system in:
a.	orders of magnitude   

b.	written out 

3.	How many times smaller is the galaxy than the visible universe in:    
a.	orders of magnitude      

b.	 written out

4.	How many times larger is the solar system than the Earth in:
a.	orders of magnitude    

b.	written out

5.	What percent of the solar system is the Earth?

6.	Why do these numbers look so different?