weathering occurs when differences in resistance or environmental factors produce uneven surfaces on rocks.

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

What is a small water source like a stream or brook?

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called