South America produces more power using___ than any other continent A. petroleum
B. nuclear power
C. solar generation
D. Hydroelectric generation

Based on the information in the graph, what can you conclude about humans in the world in general?

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

Which of the following situations is an example of an internal migration? a. moving to mexico city, mexico b. moving to san diego, califormia c. moving to toronto, canada d. moving to london, england