Plate Tectonics
What is Plate Tectonics?
Plates that are broken up on Earth's crust.
What is Continental Drift?
The theory that continents are in constant motion on earths surface.
What are the 3 main layers of Earth?
The crust, mantle, and core.
What causes Plate Tectonics?
Convection currents in the Earths mantle.
What are the 3 ways that the Continental Drift theory is proven true
Fossils, rocks and mountains, the continents fit together like puzzle pieces.
What does the mantle consist of (layers).
Uppermost mantle, the Lithosphere, the Asthenosphere, the upper mantle, and the lower mantle.
What are Convergent Boundaries?
Where two plates move towards each other.
Who was the scientist that introduced continental drift?
Alfred Wengner.
True of False,
Earthquakes can travel through any layer on earth
False,
S waves can only travel through solids and sometimes liquids, the crust and mantle
What are Divergent Boundaries?
Where two plates move apart from each other.
How do fossils prove the theory of continental drift?
Dinosaurs of the same species are found on different continents. ( The mesosaurus, a freshwater reptile is found on two completely different continents).
As you go deeper into the Earth, temperature and pressure...
Increases
What are Transform Boundaries?
Where two plates move horizontally past each other.
How do rocks and mountains prove the theory of continental drift.
Mountains form different continents have the same types of rocks as if they were once connected.
What is the Lithosphere made of?
The crust and uppermost mantle.