Human activities can add which following to the atmosphere?

a. oxygen

b. water vapor

c. heat

d. carbon dioxide

What are some ways that slate is used?

What is the oldest mountain range in north america?

Sources of salt water on earth include ice, rivers, lakes, and groundwater. true or false.

A shell is composed of three layers? - list and describe each layer.

What is the major import in France

Which planet spins fastest on its axis. Which planet spins the slowest?

Which statements describe sustainable development? Fishing does not remove more fish from water systems than can be replaced by the number of fish that will be born to replace them.

In what ways have African influences shaped Caribbean culture?

The lengths of the worms in inches are listed here

Scientists who study rock formations in caves describe some of the formations as "living rock" because, under certain conditions, they increase in size.