In the stratosphere, oxygen (O2) is converted to ozone (O3) by high energy ultraviolet light. When the equation is written and balanced using whole number coefficients, the coefficient of ozone is:

Which best describes the physical features of the Ridge and Valley region? O It has scenic canyons and caves. O It has the state's most important waterways. O It includes the state's highest peaks.

Which of the following is not one of the three regions of Oceania? A. Polynesia B. Micronesia C. Samoa D. Melanesia

Which of the following statements best describes Shenzhen, China? A. It is an emerging global city. B. It is a declining global city. C. It is a former global city. D. It never was a global city.

What is an agent of erosion?

From which world regions have many of Europe's more recent immigrants arrived?

Which region consists of a central place and the surrounding places affected by it?

Which statement about the economy of France is not true? Paris is a major manufacturing center. Marseille is a busy seaport on the Mediterranean coast. Farming is the major activity in the Alps. World-famous wines are produced in the Bordeaux region.

What is agreed upon by scientist as the most likely cause of the final extinction for the dinosaurs?

As a result of a mountainous terrain, all of the following occurred except: A independent Greek city-states arose B large empires developed C trade and outdoor markets developed D outdoor civic life flourished

Why do cities form and how have they affected culture?