What causes variations in climate and vegetation in most of the US and Canada

What is a clustered population

What two parts make up the lithosphere

What could explain the existence of coal deposits in antarctica?

List four things that might cause a species to be vulnerable to extinction:

These natural resources have made Algeria, Libya, and Egypt very wealthy. Select all that apply. gold natural gas petroleum salt

How high does the earth's atmosphere extend? A. 100 m B. 1,000 m C. 10 km D. 100km

How to grow plants in space?

Based on this map of oil imports, which nation imported the greatest number of oil barrels each day in the years before 2006? A. China B. Australia C. Canada D. the United States

How far will a P-wave travel in 9 min 20 sec?

The land in Mexico City is sinking. What is the primary cause of this problem? A. deforestation caused by cutting down trees B. too much water being taken from underground aquifers C. too many offices and towers being built in the city D.