science exam revision Flashcards
What cause the plate tectonics to move?
The heat from radioactive processes within the planet’s interior
Where do most volcanoes and earthquakes occur?
around the edges of the Pacific Ocean
(ring of fire)
What is the most common cause of a tsunami wave?
Most tsunamis are caused by earthquakes on converging tectonic plate boundaries.
Which of the plate boundaries is most likely to cause the formation of a Deep-Sea Trench?
convergent plate boundary.
What are the three types of plate boundaries?
Convergent
divergent
transform
describe convergent
Two plates colliding
describe transform
Two plates sliding past each other
describe divergent
Two plates moving apart
what is convection currents
Convection currents are heat-driven cycles that occur in the air, ocean, and mantle.
What occurs at these plate boundaries?
one plate dives (“subducts”) beneath the other, resulting in a variety of earthquakes and a line of volcanoes on the overriding plate;
What are some features of these plate boundaries?
Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines
Where are tsunamis most likely to occur?
Pacific Ocean.
What are the 7 major bathymetric features?
Bathymetric features such as the continental shelf and seamounts
What is the difference between a La Nina and El Nino?
la Nina: occurs when winds near the equator becomes stronger, El Nino the push on oceans surface forms to
Ocean currents
transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics.
