The crust, mantle, and core are all part of the
a. hydrosphere.
b. atmosphere.
c. biosphere.
d. geosphere.

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

Less developed nations have low literacy rates. true or false

Formidable obstacles of climate, terrain, and distance hinder exploitation of natural resources in russia. true false