WorksheetsOcean Trench
Total questions: 15
Worksheet time: 15mins
The deepest part of the ocean; long, narrow ditches
Tectonic plates
Trenches
Divergent boundary
Continental shelves
True or false : Deep-Ocean Trenches are underwater canyons?
False
True
At subduction zones, a deep (a) forms under the ocean.
When subduction happens, which plate will go under the other plate?
the denser one
the less dense one
the one with magma
the one with mountains
When a plate that is subducting gets stuck and then moves suddenly, what two things can happen?
tsunamis
earthquakes
volcanoes
diches
Observe this diagram of a plate boundary. One statement BEST describes what is happening. It is that
the oceanic crust is melting.
the denser ceanic crust is subducting under the less dense oceanic crust
volcanic islands are forming.
the tectonic plates are moving away from each other.
An area of low elevation in the oceans found near convergent boundaries?
trench
mid ocean ridge
plateau
What process happens at trenches?
sea floor spreading
subduction
transformation
What is the primary geological process occurring at ocean trenches?
Subduction
Sea floor spreading
Volcanism
Erosion
Which ocean trench is the deepest known on Earth?
Mariana Trench
Tonga Trench
Puerto Rico Trench
Java Trench
True or False: Ocean trenches are typically found at divergent plate boundaries.
True
False
What type of plate boundary is most commonly associated with ocean trenches?
Convergent
Divergent
Transform
Passive
Which of the following best describes the shape of an ocean trench?
Long, narrow, and deep
Wide and shallow
Circular and deep
Flat and wide
What is a significant consequence of the subduction process at ocean trenches?
Earthquakes
Hurricanes
Tornadoes
Floods
Which scientific instrument is commonly used to measure the depth of ocean trenches?
Sonar
Seismograph
Thermometer
Barometer
