Which planet has the shortest period of revolution?

A.

Mars

B.

Earth

C.

Venus

D.

Mercury

How long does it take the moon to travel 3/4 around the earth

5. It has been generally concluded that Mars at one time had significant amounts of water. What evidence is there to support this conclusion?

The layers of Earth's atmosphere are separated by which of the following? a. cloud bands b. different types of gases c. changes in temperature trends d. sudden differences in air pressure

Which of the following correctly defines multiculturalism? A. and ethnic minority assimilating into the culture of the majority population B. many cultures living together in one area C. the ability to speak more than one language

How many countries have french as an official language

What percentage of precipitation falling on the land becomes surface water, or runoff, and flows to the sea in river and stream channels?

If you want to go mountain climbing in your state park what map is the best tool to use

What is the most accepted theory about early human migration to the Americas

What's the difference between cyclones and hurricanes

What is the relationship between South Korea and China like? Are they allies or enemies?