Horizontal lines of latitude that run across the globe are known as

A. parallels

B. meridians

C. hemispheres

D. poles

How is good (stratospheric) ozone formed? a. combining an oxygen molecule (O2) an atom of chlorine (Cl) b. combining a single oxygen atom (O) with an oxygen molecule (O2) c. combining two single oxygen atoms d. breaking apart an oxygen molecule

What causes global warming/climate change?

Which of the following is NOT a general characteristic of an air mass source region? O surfaces of uniform elevation O light surface winds O surfaces that are very cold O surfaces of uniform composition

Define the terms "density" and "differentiation" with respect to Earth's geological history and explain how "density" was important during "differentiation".

Based on what you have learned about the religion, economy, and physical geography of medieval europe, why do you think the muslims were not able to conquer most of that continent?

Why might the eastern section of the united states and canada experince higher levels of acid rain than the extreme northen and western sections of the region?

What is the relationship between plate tectonics, earthquakes and volcanoes? how are all of these activities related?

Five friends earn a total of $50 doing yard work in their neighborhood. Each friend earns the same amount. Use the equation 5f=50 to find f, the amount that each friend earns

What three countries colonized the United States and Canada?

Why might ethnic differences cause problems in one region or society but not in another?