The leading edge of a cold air mass that overtakes a region formerly occupied by a warm air mass is called a a. warm front. c. stationary front. b. cold front. d. occluded front.

Which are the three most important types of commerce?

How are the levels of development related to free enterprise?

What are the names of the Great Lakes? Are they salt water lakes or fresh water lakes? Are any of them connected to any of the oceans? Which state (s) borders the Great Lakes?

A company is cutting down a large area of trees in order to build a new neighborhood. What immediate impact will this have on the environment? What long-term effects will this have on the environment?

What do scientists believe about ancient and recent geologic processes?

Which of the following is not a natural cause of climatic change? A. Human activity B. Solar activity C. Earth's tilt D. Volcanic activity

Where are the cool and the hot regions of the mantle located under?

Limited water resources have promoted scientist developed ways to remove salt from seawater to make it usable for drinking in farming this process is called

The internet and cell phones are examples of what media

What is the difference between the windward and leeward side of a mountain?