1. Which feature below is a subduction zone associated
with?
a. Flat topography
b. Mantle upwelling
c. Deep trench
d. Mid-ocean ridge
2. Since oceanic crust is constantly being produced, the
size of the Earth is increasing in size over time.
a. True
b. False
3. The volcanoes that make up volcanic arcs always sit directly on top of the plate boundary of a subduction zone.
a. True
b. False
4. What is frequently a warning sign of an impending
tsunami?
a. Winds suddenly change direction
b. The sky suddenly clears
c. Seawater suddenly retreats from the shoreline.
d. All of the above
5. Powerful tsunami are most frequently produced by
__________.
a. Earthquake
b. Landslide
c. Hurricanes
d. Volcanoes
e. Asteroid impact
6. Tsunami can be generated by a
hurricane.
a. True
b. False
7. If the seafloor is suddenly displaced vertically, the
ocean water will respond by:
a. Subsiding
b. Not moving at all
c. Also moving vertically
8. Calling a tsunami a “tidal wave” is misleading
because:
a. A tsunami is not really a tide
b. A tsunami is not really a wave
c. A tsunami does not occur in the ocean
d. A tsunami only occurs during ebb tides
9. The fault motion along the San Andreas fault on the
sea floor can directly be the cause of a dangerous tsunami
along
the coast of California.
a. True
b. False
10. Which is the most active tsunami
area?
a. North Atlantic ocean
b. Indian ocean
c. Caribbean sea
d. Pacific ocean
1. Deep trench is associated with subduction zone.
When two plates collision happen higher density plate goes to mantle and low density plate present above so between two plate very deep trench formed on ocean floor.
Other options are not with subduction zone.
Mid oceanic ridge is formed where plates divergence happen.
Mantle upwelling happens in mid oceanic ridge that is hot magmatic convection rise upward as results plates diverge happens.
Flat topography is present where no tectonic activities happens.
2. False.
Because some oceanic crust newly form on earth surface at one region but at other region of earth surface subduction of oceanic crust (destruction of plates) happen. As result destruction of plate happened. so both processess are maintain balance each other. So shape and diameter of earth is constant.
New oceanic plate creates and older oceanic crust destroyed by subduction processes. it maintains it equilibrium so it doesn't affect in earth size , shape , diameter and radious.
3. True
A volcano always formed arc shape above subduction zone . Generally when oceanic crust subducted it's boundary is not planar it creates arc shape. During volcanism , volcanoes are formed parallel to subduction margin.
4. Option C - seawater suddenly retreat from shore line.
When tsunami happens it more fluctuates seawater. In beach or tidal region ,water goes away from coast as result sediments beds are exposed .
It is happen due to when tsunamis wave trough reaches first without wave crest near the shore ,so water is moves away from coast then wave crest reach the shore and water goes over land ward.
Tsunamis doesn't affect the wind direction and clear sky. Tsunamis are formed in under water so it not affects the climate or weather.
1. Which feature below is a subduction zone associated with? a. Flat topography b. Mantle upwelling...
The sliding of seafloor beneath a continent or island arc is known as Question 1 options: obliteration. subduction. obduction obfuscation Question 2 (1 point) Which of the following is a characteristic or feature of a convergent plate boundary? Question 2 options: plates pushing together subduction volcanic arc trench all of the above Question 3 (1 point) ocean-ocean convergent boundaries are also sites of subduction Question 3 options: True False Question 4 (1 point) The subducting plate at a convergent boundary:...