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The map below represents the location of a volcano on the mid-Atlantic ridge in Iceland (star), and the thickness, in centimeters, of volcanic ash deposited from an eruption of this volcano through isolines. Points A and B represent locations in the area.

(a) To construct a profile of the ash thickness between point A and B, align points A and B on the grid on points A and B on the given map.

Then, plot the thickness of the volcanic ash along line AB by marking with a dot each point where an isoline is crossed by line AB.

We now obtain a grid with points of intersection of the isolines cross by line AB:

Project these dots with their equivalent thickness as indicated by the y-axis of the grid.

(b) Connect the dots to complete the profile of the thickness of the volcanic ash.

Wind was blowing from the north when the volcano was erupting.

Iceland is at a hot-spot and it is also located at a mid-ocean ridge.

– A fault. (OR)
– A trench. (OR)
– A subduction zone. (OR)
– Peru-Chile trench.

Divergent movement or seafloor spreading.

The mid-ocean ridge is a divergent plate boundary where seafloor spreading occurs. Bedrock samples are younger near the center of the mid-ocean ridge and they become older as they move away from the mid-ocean ridge.

The graph below shows the relative age of the bedrock samples between points B and C. This shows that the midpoint of locations B and C is the mid-ocean ridge where younger samples are present, and as we move away from the mid-ocean ridge towards points B and C, the bedrock samples become older.

-The arrival time of the P-wave at station A is later than the arrival time of the P-wave at station B.
(or)
– The arrival time difference between the P-wave and S-wave is greater at station A

The map below shows an earthquake intensity isoline map in the southwestern United States with an interval of 2 units.

Isolines are lines that connect data points of the same value in a map. The points with the same intensity are connected by isolines to draw an accurate isoline map of earthquake intensity.

Pasadena is closest to the earthquake epicenter.

Earthquakes in this part of the united states are probably caused by movement along the boundaries of the north american and pacific plates. (OR) Earthquakes in this part of the united states are probably caused by movement along the San Andreas fault.

1- Make an emergency kit of important phone numbers.
2- Learn drop, cover and hold procedures.
3- Practice a family disaster plan.

Range from 500°C to 1200°C.

Indian-Australian Plate.

Subduction. (OR) Convergence.

Move to higher land. (OR) Evacuate.(OR) Move inland.

one possible landscape feature would be a volcano such as those in hawaii, because the formation of hawaiian volcanoes was associated with a hot spot

since there is no plate tectosics on Mars there would be no mid-ocean ridges and continental rift valleys associated with plate divergence.Without plate convergence there would be no chains of volcanoes like island arcs,no oceanic trenches, no folded or fault block mountains where plate converge

There would be no subduction and rifting on mars without plate movements.

Folded mountains are formed at places where plates converge in association with young mountains and without plate movements folded mountains most likely would not exist on mars.

Most metamorphic rocks on earth form in association with the regional metamorphism of plate convergence and without plate movements on mars this type of metamorphic rock would not be likely to exist. since mars has volcanoes, there must have been magma and lava to cause contact metamorphism. thus mars should have contact metamorphic rocks.

– Region: California.
– Explanation: Crustal movement along the San Andreas fault.
(OR)
– Region: Pacific Northwest coast.
– Explanation: A subduction zone is nearby.

– Continent shapes fit together like puzzle parts.
(OR)
– Sea-floor spreading occurs at mid-oceanic ridges.
(OR)
– Fossil evidence is found in the matching bedrock of South-America and Africa.

– West coast of South America.
(OR)
– Aleutian Trench.

From 70 To 700 Kilometers.

Triassic period.

Because B located at a transform fault, but location C is at a subduction boundary.

due to crustal plates collide at location A and there is no collision at location D.

E located above a mantle hot-spot, but F is near to the plate center.

Because location G is at the ridge and is presently forming, while H was at the ridge in the pass. Due to the youngest rocks are near to the ridge while the oldest are far away from the ridge.