By shutting down the fuel cells, what will the astronauts not be able to do while they are in space?

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 happens to rock when acid reacts with it?

Which of the following physical characteristics best explains the climate of the area that is circled in black on the climate map above?