<span>Experiments in which all variables are identical except for one are called controlled experiments. This where an observer tests his hypothesis by looking on changes that were brought about by one variable. The results are always dependent on one adjusted variable.</span>
Answer:
ee course that breaks down the basics of international relations and foreign policy. World101 modules are extremely flexible and free. No registration required. Social studies resources. Free Teaching Resources. Global Civics.
They elected Jefferson Davis as their president.
The industrial revolution caused a lot of pollution and is a big part of why we have global warming, it also meant that America began to have even more slaves