physical processes impact on the magnitude and type of volcanic erupption, and earthquake magnitude and focal depth.

Question 1

constructive margins

Answer 1

-eruptions small
-basalt lava low gas content and high viscocity

-earthquakes shallow and have low magnitudes = minor

Question 2

convergent

Answer 2

range of focal depths
-benioff zone (area of subduction)
-can cause very large earthquakes
-benioff zone affects focal point

-descending plate melts = creates high gas and silica content magma = explosive eruption

Question 3

collision zones

Answer 3

-huge earthquakes

Question 4

conservative

Answer 4

-shallow focal depths = high magnitude