In the following situations, propose a possible question a scientist can answer to solve the problem.  Be specific.

1. A scientist wants to establish how color effects plants.  Design an experiment that will help the scientist find out.
     
2. A scientist wants to establish if two rocks are the same.  What can that scientist do to find out if they are the same?
     
3. A scientist wants to establish if people who smoke cigarettes have more deaths due to lung cancer then people who do not smoke.  How can that scientist find out?