Earth Science Lesson 1 PDF

 Through time, this supercontinent split into two sub-continents, Laurasia and Gondwanaland Million years further, Laurasia split into a few smaller continents forming the continents in the northern hemisphere of the Earth. This includes Asia, Europe, North America, South America, and Africa. ...

 Through time, this supercontinent split into two sub-continents, Laurasia and Gondwanaland Million years further, Laurasia split into a few smaller continents forming the continents in the northern hemisphere of the Earth. This includes Asia, Europe, North America, South America, and Africa.  On the other hand, the continents of the southern hemisphere, Australia and Antarctica, are the two continents divided from Gondwanaland.  Quick Question Would fitting edges of continents be enough proof that the continents are drifting? What are the other pieces of evidence gathered by Wegener to support his Continental Drift Theory?  Evidences Geological "fit" evidence is the matching of large- scale geological features on different continents.  Evidences Glaciers carve rocks and leave marks as they move. In this evidence, scientists can determine the direction of movement of each continent.  Evidences Coal deposits in Antarctica suggested that it was once located near the region of the Earth where the climate is enough to support complex life forms such as plants and tall trees.  The Mesosaurus Reptile, propelled itself through the water Early Permian period (286 to 258 million years ago), Found solely in South Africa and Eastern South America. Would have the capability to swim across such a large body of ocean like the Atlantic because it was a coastal animal.  The Cynognathus Mammal-like reptile, large as a modern wolf Triassic period (250 to 240 million years ago) South Africa and South America  The Lystrosaurus Translates to "shovel reptile," is thought to have been a herbivore with a stout built like a pig. Antarctica, India, and South Africa  The Glossopteris Plant fossil, known to be large and bulky Australia, Antarctica, India, South Africa, and South America— all the southern continents. What is Plate Tectonic Theory? It also states that the Earth’s crust is composed of several broken plates that continuously move either away, past, or towards each other.  Principles of Plate Tectonics Principle 2 Principle 1 Gravity Plates are provides driven by additional cooling of force to move Earth plates  What is Plate Tectonic? Also called lithospheric plate is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.  What are Plates Tectonic? Is rigid and brittle Contains crust and upper mantle Is 100km thick at the surface of the Earth Fractures to produce earthquakes  Subduction Where they collide and one plate is thrust beneath another (a subduction zone), the most powerful earthquakes, tsunamis, volcanic eruptions, and landslides occur. Where Earth's tectonic plates dive back into the mantle Subduction Zone  SLOWEST vs FASTEST They are all Tonga slow Microplate The African Samoa Plate's speed is 24cm estimated at (9.4 in) a around 2.15cm year (0.85in) per year Plates move 1-10 cm per year (= rate of fingernail growth)