Which of the following is true about the grand coulee dam? a. it is almost as tall as niagara falls. b. it provides hydroelectric power. c. it is the only naturally occurring dam in the columbia plateau. d. it is the only dam on columbia river.

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

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

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.