The weight of ice atop a continent can depress the depth of the ...

[saraeharris]

The weight of ice atop a continent can depress the depth of the shelf break. Indicate whether the statement is true or false.

Question 2

The sinking of the RMS Titanic fueled research that would change the science of bathymetry. Indicate whether the statement is true or false.

[missalyssa26]

Answer to Question 1

ANS: T
Antarctica depresses the shelf break to 300 to 400 meters rather than the 140 meters found consistently
worldwide. Similar effects on the shelf break are observed in Greenland. Information can be found in
the section Continental Margins May Be Active or Passive.

Answer to Question 2

ANS: T
The Iceberg Detector and Echo Depth Sounder was created by a former employee of Thomas
Edison. This detector directed a sound pulse underwater ahead of the ship as crew members listened
for the echo. An echo indicated a submerged iceberg. It was easy to direct the beam downward to
sense the distance to the bottom of the seafloor. Information can be found in the section The First
Scientific Experiments Were Undertaken by Governments.