Hot Spots and Island Chains

Question 1

Stage 1

Answer 1

Radioactive decay in lower mantle

Magma rises to oceanic lithosphere as magma plume

Question 2

Stage 2

Answer 2

Plume is stationary, lithosphere is not
Oceanic plate moves over fixed hot spot
magma forces its way through weaknesses to from submarine volcano

Question 3

Stage 3

Answer 3

Millions of years of volcanic activity causes this volcano to grow above water level forming a volcanic island

Question 4

Stage 4

Answer 4

Lithosphere moves due to convection currents, volcanic islands move away from magma plume becoming extinct

Question 5

Stage 5

Answer 5

Over time these Islands cool and subside and are weathered and eroded (become smaller over time)

Question 6

Stage 6

Answer 6

New Islands form as fresh oceanic crust takes its place over the rising mantle plume

Question 7

Draw a hot spot and Island trail

Answer 7

Yes