Major sources of income for the Mexican economy include all of the following except

What do conservationists do?

A flood plain has the potential to flood. Why is this a problem? A. flood damage is extremely costly due to homes and businesses being built on the flood plain B. floods are unnatural events caused by human activity C.

the oldest rocks on earth date from about 4.2 billion years ago. what does this suggest about the interval between 4.6 billion years ago, when the earth started to form, and 4.2 billion years ago?

Which part of Europe has advanced communications and transportation systems?

A "polar-wander" curve shows A. how magnetic poles have moved on the earth. B. how the sea floor has spread. C. how continents have moved, or drifted, relative to the magnetic poles. D. how polar glacier ice has moved across continents.

What were some of the examples of the control Kim Jong Il has over the knowledge allowed in North Korea?

What portion of the Earth's surface is too hot, cold, or wet to grow crops?

1. The number and location of bones of many fossil vertebrates are similar to those in living vertebrates. This is evidence in support of which of the following concepts?

What fact or facts support a situation where trade is disadvantageous?

How can you tell that a government is a dictatorship?