Igneous rocks are formed from eroded land.

a. True

b. False

What is the difference between a barrier reef and an atoll? a. Barrier reefs surround an active volcano emerging above sea level, while atolls surround the previous location of a submerged volcano. b.

Iron atoms combine with oxygen atoms to form rust. Is this a physical property of iron or a chemical property?

Which historical event encouraged the migration of two million Iranians to Europe, North America, and Australia in less than 30 years? a) the Holocaust b) genocide c) the Islamic revolution d) the fall of communism in Eastern Europe

Why is natural gas nonrenewable

Explain how water molecules bond to each other what makes water a polar molecule

Which countries border central america to the north and south

What is the state whose neighbors are idaho, wyoming, north and south dakota, and canada?

Wind occurs when air masses move from one place to another. What causes the movement of air masses?

Describe the typical movement of energy through an ecosystem

What name is given to the process by which detritivores return carbon to the atmosphere?