Which statement is true for all minerals? a. they have a crystalline structure. b. they contain useful metals. c. they are made of silicon and oxygen. d. they are too hard to be scratched with a nail.

How has industrialization hurt the forest of europe

Which is a possible result of higher air temperatures caused by global warming? a. increase in sea level b. freezing of polar ice caps c. rapid evaporation of water in the soil d. flooding of low-lying coastal areas

While most people who lived in ancient egypt and the middle east avoided settling in nearby deserts, those regions protected them from their enemies. why do you think this was true?