Which of the following choices is the most abundant chemical sedimentary rock?

a. breccia

b. conglomerate

c. limestone

d. quartz

Why the sun we can't touch is important to all life on earth

Are volcanic eruptions a physical process

In central and west africa, the main threat to species such as the elephant, rhinoceros, and mountain gorilla, is

What is a blue corn moon

Which of the following is NOT a physical feature found in Central and Southwest Asia? a. the Aral Sea c. the Nile River b. the Caucus Mountains d. the Tigris River

Which of the following European countries is one of the top three leading exporters in the world? A) United Kingdom B) Germany C) Spain D) France

Fault lines are: the crust of the lithosphere that has fractured along plate boundaries and ridges the crust of the athenosphere that has fractured along plate boundaries and ridges the crust of the biosphere that has fractured along plate

Which US region historically has been dependent on the Entertainment, software and aerospace industries as a part of its economy?

What is the life expectancy of a plastic bags

What is rain useful for? Why does it rain?