The document discusses plate tectonic theory, including how geologists proposed that Earth's crust is made up of plates that move over time. It introduces Alfred Wegener's theory of continental drift, which proposed that continents move apart, and how fossil evidence later helped support this idea. It also discusses how plate tectonics can explain seafloor spreading through processes like magma formation at mid-ocean ridges. Additionally, it examines how mountain formation can occur through the compression and shearing of tectonic plates.

1. Plate Tectonics

2. Is Earths crust moving

3. Is Earths crust moving
Geologist is a scientist who examines rocks

4. Is Earths crust moving
Geologist is a scientist who examines rocks
Theory of Continental Drift: Wegener’s theory of the
continents moving apart

5. Is Earths crust moving
Geologist is a scientist who examines rocks
Theory of Continental Drift: Wegener’s theory of the
continents moving apart
Continental drift theory was helped to be proven by
the fossils left behind

6. Is Earths crust moving
Geologist is a scientist who examines rocks
Theory of Continental Drift: Wegener’s theory of the
continents moving apart
Continental drift theory was helped to be proven by
the fossils left behind
Supercontinent: PANGEA

7. What causes the Ocean
floor to spread

8. What causes the Ocean
floor to spread
Plate Tectonics explain how forces cause the Ocean
Floor to spread

9. What causes the Ocean
floor to spread
Plate Tectonics explain how forces cause the Ocean
Floor to spread
Magma: is hot melted rock that causes tension or a
stretch or push on the plates
Cooling magma forms the mid-ocean ridge

10. How do Mountains form

11. How do Mountains form
Compression: Squeezing or pushing together
of the crust this produces folded mountains

12. How do Mountains form
Compression: Squeezing or pushing together
of the crust this produces folded mountains
Shear: Plates rub past another this produces
faults