Describe two experiments and explain how each provided some evidence that led to newer models of the atom.

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above