The Appalachian and Caledonian mountains are the SAME mountains. Why is half the mountain chain in N. America and the other half is in Europe?
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
__________ are areas where plates collide with denser plates sinking below less dense plates. Volcanoes are often formed because of this. | arrow_right_alt |
seafloor spreading |
New oceanic crust is formed at mid-ocean ridges. This happens through the process of __________. | arrow_right_alt |
convection current |
Hot magma rising and cold magma sinking causes a __________ resulting in continental drift. | arrow_right_alt |
tectonic plates |
The lithosphere is broken up into __________. | arrow_right_alt |
subduction zones |
The ocean floor gets the further it is from mid-ocean ridges and is colored and blue. The ocean floor is pushed apart near these ridges because of pushing up from the . The newer rock, closes to the zone, is colored .
Evidence for seafloor and continental can be found in the seafloor as alternating, or changing polarity of oceanic crust. Hot magma pushing up at the mid-ocean ridge is sensitive to Earth's field. When the hot magma touches the cold ocean water, it cools and turns into rock, 'recording' or 'capturing' Earth's at that moment.
How does this picture explain what we are studying? The colors show where we have found these 4 types of fossils.
Organize earth's layers from outer to inner
mantle
crust
inner core
outer core
