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Ocean Exploration (Grade 9)

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Ocean Exploration

A diving bell is a cable-suspended airtight chamber, open at the bottom that is lowered underwater to operate as a base or a means of transport for a small number of divers.
  1. True
  2. False
A bathysphere is a spherical deep-sea submersible that is unpowered and is lowered into the ocean on a cable.
  1. True
  2. False
SCUBA, an acronym for "self-controlled underwater breathing apparatus," refers to divers using equipment supplied with breathing gas using an umbilical cord.
  1. True
  2. False
The basic purpose of oceanographic research ships is to provide a working platform and mobile research station for scientists.
  1. True
  2. False
A submersible is a watercraft capable of independent operation below the surface of the water.
  1. True
  2. False
A floating observation station that automatically takes measurements and transmits the data to scientists is known as an oceanographic buoy.
  1. True
  2. False
Autonomous underwater vehicles (AUVs), otherwise known as underwater drones, operate independently of direct human input and may stay submerged for hours or days at a time.
  1. True
  2. False
This type of sampling allows the study of the sediment layers of the ocean.
  1. rock dredging
  2. dragging
  3. seafloor drilling
  4. scraping
This remote sensing device's signal can penetrate through layers of rock and give a picture of the layering of the oceanic floor.
  1. echo sounder
  2. seismic profiler
  3. magnetometer
  4. microwave radar
Maps made from                 readings were some of the first used to show the ocean floor's topography is as varied as the continental surface.
  1. radar
  2. ping
  3. satellite
  4. sonar
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