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?
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Question 1
1.
Draggable item
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Corresponding Item
New oceanic crust is formed at mid-ocean ridges. This happens through the process of __________.
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seafloor spreading
Hot magma rising and cold magma sinking causes a __________ resulting in continental drift.
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convection current
The lithosphere is broken up into __________.
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tectonic plates
__________ are areas where plates collide with denser plates sinking below less dense plates. Volcanoes are often formed because of this.
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subduction zones
Question 2
2.
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 ________ .
Other Answer Choices:
red
green
rift
older
younger
mantle
magma
Question 3
3.
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.
Other Answer Choices:
drift
polarity
spreading
magnetic
Question 5
5.
How does this picture explain what we are studying? The colors show where we have found these 4 types of fossils.