Plate Tectonics Oceanic and Continental Crust The top layer of the Earthâs surface is called the crust. Oceanic crust (the thin crust under the oceans) is thinner and denser…

Inside the Earth Planet Earth All objects on or near Earth are pulled toward Earthâs center by gravity. Earth formed as gravity pulled small particles together, that would…

Chapter 6. Age and Growth of Continental Crust from Radiogenic Isotopes pp. 321-348 What is the crust? Continental crust? 1. Total mass = 0.6% silicate earth 2. Main reservoir…

Volcanoes destroy and volcanoes create Volcanoes destroy and volcanoes create What is a Volcano? Opening in the Earthâs surface where magma escapes The word volcano is derived…

Theory of Plate Tectonics How do we know the plates exist?   Earthquake and Volcano Zones Ocean floor features (Trenches and Mid-Oceanic ridges) Lithospheric Plates 7…