Certain gases in the atmosphere trap heat on earth. what is the name of phenomenon?
the greenhouse effect
global warming
glacial melting
cooling period

How did the romanov dynasty increase russia's power? need many details, you!

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.

Why did lincoln inform the confederacy that he would not e sending troops or weapons as food supplies were sent to fort sumter?