When chemical emissions from automobiles, power plants, and factories react with water vapor in the air it creates _________.
What percent of the United States is covered in forests?
What is the approximate population of Mexico City?
What are the first settlers of America known as?
Who is the head of state in the United States?
President
What is the largest island in the world?
What percent of Canada is covered in forests?
What is the world's longest mountain range, which is located in South America?
In what area do most people in the US and Canada live?
What are the official languages of Canada?
English and French
What is the third tallest volcano in North America?
Which two minerals do Canada supply most of the world with?
Copper and Silver
What was the scientific explanation for the Mayan disappearance?
What is the biggest cause of population of growth in the US?
What are the 2 heads of government in Canada?
Queen of England and Prime Minister
Niagara Falls is located on a river connected by two lakes, what are the two lakes?
What three minerals are found in North America?
Gold, silver, and copper
What country connects North America to South America?
What is the most important factor of a country's population density?
Area
What language do many people in Brazil speak?
Portuguese
What makes up the eastern half of Canada and northeastern United States?
What country is the world's leading exporter of copper?
Chile
In which two regions was the Mayan civilization located?
Southern Mexico and Northern Central America
What areas of the United States are the most densely populated?
Northeast, Great Lakes, and Pacific Ranges
What are the three branches of the United States government?
Executive, Legislative, and Judicial