Zusammenfassung der Ressource
Frage 1
Frage
Seismic waves are used to map the earth's structure.
Frage 2
Antworten
-
The mid-ocean ridge pulling plates together.
-
Newly formed plates becoming denser and thicker at a mid-ocean ridge, causing the mantle to sink under its own weight.
-
Slabs of rock being pulled side to side as an S wave moves them horizontally, causing scarring to the land, and massive erosion.
Frage 3
Frage
Approximately every 400,000 years the magnetic fields of the earth change direction, resulting in the north pole and the south pole swapping.
Frage 4
Frage
As seafloor spreading produces new crust, what occurs to the excess crust left behind?
Antworten
-
It is left on the earth, causing gradual growth over thousands of years.
-
It is weathered by biological matter, or eroded by water.
-
It is subducted, melting in an area known as the subduction zone.
-
It is mined for resources, farmed like fruits or vegetables.
Frage 5
Frage
Plate boundary collision/contact is the only reason a Volcano may occur.