What is the purpose of the tenth amendment? a.to give each state constitution the same protections as the federal constitution b.to grant to the citizens of each state access to the federal court system c.to limit the powers of the central government by establishing reserved powers for states and individuals d.to establish the electoral college?

C.to limit the powers of the central government by establishing reserved powers for states and individuals

The scenario in which a scientist who is studying earthquakes includes the impact of wind when performing some tests of damages to structures is an example of failing to hold all other things constant.
In every research and experiment, there are variables that are held constant in order to see how another variables influence the result of the experiment.