After watching Expedition #6 and going on a voyage to map the sea floor ( Expedi
ID: 149880 • Letter: A
Question
After watching Expedition #6 and going on a voyage to map the sea floor ( Expedition #6-“Measuring the depths of the sea floor” ). Develop a well written paragraph. (150 words) that covers the following questions. 1. Why is it important to study the shape of the sea floor.? Discuss a few methods used to study the sea floor and its features. 2. You have read about aspects of the sea floor. Does “experiencing them virtually “ add to your understanding.? Share at least one example. After watching Expedition #6 and going on a voyage to map the sea floor ( Expedition #6-“Measuring the depths of the sea floor” ). Develop a well written paragraph. (150 words) that covers the following questions. 1. Why is it important to study the shape of the sea floor.? Discuss a few methods used to study the sea floor and its features. 2. You have read about aspects of the sea floor. Does “experiencing them virtually “ add to your understanding.? Share at least one example. 1. Why is it important to study the shape of the sea floor.? Discuss a few methods used to study the sea floor and its features. 2. You have read about aspects of the sea floor. Does “experiencing them virtually “ add to your understanding.? Share at least one example. Discuss a few methods used to study the sea floor and its features. 2. You have read about aspects of the sea floor. Does “experiencing them virtually “ add to your understanding.? Share at least one example.Explanation / Answer
Why is it important to study the shape of the sea floor.?
At the bottom of the ocean, there are layers of sediments that contain information about the Earth’s history. Oil and gas are found in deposits below the seafloor.
Discuss a few methods used to study the sea floor and its features.
Bathymetry: Echo sounders are instruments placed on research ships that send sound towards the seafloor and measure the time it takes for the echo to come back.
Side scan sonar imagery: The side scan sonar instrument shares the same principle as the echo sounder, but the sound is emitted and received from the sides of the instrument. In this way, marine geologists are able to obtain an image of the shadows of the features on the seafloor, which is very similar to a black and white photograph.
Seismic reflection: Sometimes scientists are interested in what is found underneath the seafloor. It is very expensive to drill holes into the seabed, so seismic reflection systems are used to send sound waves into the seabed and get an image of the rocks and sediment making up the seafloor, very similar to an X-Ray image.
You have read about aspects of the sea floor. Does “experiencing them virtually “add to your understanding.? Share at least one example.
Depressions in the surface suggest the presence of massive seafloor features, such as mid-ocean ridges and seamounts that increase gravitational pull. Bulges in the surface are evidence of deep seafloor trenches and fracture zones, which decrease the gravitational pull.