Features of the Seafloor Read and use the information to complete the response below. Before World War II, people thought the seafloor was completely flat and featureless. There was no reason to think otherwise. But during the war, battleships and submarines carried devices called echo sounders. An echo sounder produces sound waves that travel outward in all directions. The sound waves bounce off underwater objects and the seafloor and return to the ship. The purpose of using echo sounders during the war was to detect enemy submarines. However, most of the sound waves did not hit submarines. Instead, they traveled to the bottom of the ocean and provided data that could be used to MAP THE SEAFLOOR. Scientists were surprised to learn that there are long, continuous ridges of huge MOUNTAINS IN THE MIDDLE OF THE OCEANS. For example, a mid-ocean ridge runs approximately north-south through the center of the Atlantic Ocean. Scientists were also surprised to find out that there are very DEEP TRENCHES around the edges of continents near chains of active volcanoes. Explain in paragraph form how echo sounders were used to learn about the seafloor. *

Which of the four major uses is predicted to change the least by 2020?

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.