Most of Earth's dry air is made up of

A. carbon dioxide and oxygen.

B. nitrogen and argon.

C. nitrogen and oxygen.

D. oxygen and argon.

What country is also a continent? What three large countries make up North America?

Which conclusion can be drawn from the graph data? Mexican cities have larger populations than US cities. The third most-populous city shown on the graph is in Mexico. The top three most-populous cities shown on the graph are US cities.

Why do boundaries between states cause problems

Which of the following gulfs are in Southeast Asia? A. the Gulf of Aden and the Gulf of Bahrain B. the Gulf of Mexico and the Gulf of California C. the Gulf of Thailand and the Gulf of Tonkin D. the Gulf of Suez and the Gulf of Oman

Why is it important to study trends in population growth?

Conseqüências da guerra dos balcãs

What do you often find in sedimatary rocks?

Changes to the earth that can be explained by plate tectonics include all the following except ___ Earthquakes, erosion, mountain ranges, volcanoes

Iron: A. is forming today in the Great Lakes region as banded-iron formations (BIFs). B. is stronger and weighs less than aluminum. C. was the first of the common metals (iron, aluminum, and copper) to be used by humankind. D.

Glacier store about 70% of the worlds freshwater true or false