Question

Choose which statements are true or false.

Subduction inolves more dense, oceanic crust sliding under less dense, continental crust.
Movement of tectonic plates usually happens very rapidly.
It is believed that all the continents were once one large "super continent" known as Pangea.
Mid-ocean ridges form from separation of oceanic crust only, rift valleys form by separation of continental
crust only.
Earthquakes occur at fault lines formed at divergent plate boundaries..

Answer 1

Subduction involves oceanic crust sliding under continental crust, movement of tectonic plates happens slowly, Pangea was a supercontinent, mid-ocean ridges form from separation of oceanic crust, and earthquakes occur at divergent plate boundaries.

Step-by-step explanation:

1. True - Subduction involves more dense, oceanic crust sliding under less dense, continental crust. This occurs at convergent plate boundaries.

2. False - Movement of tectonic plates usually happens very slowly over geologic time.

3. True - It is believed that all the continents were once one large 'super continent' known as Pangea. This theory is supported by evidence from the arrangement of continents and matching fossils.

4. False - Mid-ocean ridges form from separation of oceanic crust only, and rift valleys form by separation of continental crust only.

5. True - Earthquakes occur at fault lines formed at divergent plate boundaries, where plates are moving apart.

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