1.8 Making Waves

Question 1

Submarine Earthquakes

Answer 1

An earthquake that occurs at the bottom of a body of water and usually leads to a tsunami.

Question 2

Subduction Zones

Answer 2

Dense oceanic crust descending under less dense continental crust and melting temperatures lowered in the nearby asthenosphere due to more seawater into the ocean trench and beginning to partially melt.

Question 3

Steps in tsunami

Answer 3

Depth Of Water Decreases
Land Is Shallower
Friction Between Water & Seabed Increases.
Bottom of wave slows down due to backwash.
Top of wave elongates as the speed is the same.
Wave Crashes down and swash is made.

Question 4

Factors Affecting Tsunami

Answer 4

Original Water Depth
Gradient of land. 
Rock type 
Depth Of Benioff Zone
Amount Of Plate Subducted.