All the water and water vapor on earth are found in

the hydrosphere
the biosphere
the geosphere
the atmosphere

Where was oil production at its highest in the 1980s and still remains important to the russian economy? central asia the ural mountains russian siberia the caucasus region

What is the term for a government where power is carefully divided between a central government and several regional or provincial governments? a.) unified or central government b.) federal government c.) confederate government d.) republican government

Which of the following factors is one of two that is usually most responsible for determining population growth? a. total number of people within a continent b. average number of people in a given area c. world's total population d. average weight of people in a given area