Geo. 101 – 1st Edition Lecture 2 Outline of Last Lecture I. Scientific MethodII. Origin of the UniverseOutline of Current Lecture I. Rock TypesII. Formationsa. The Earthb. The MoonCurrent LectureRock Types:- Igneous: Most of these rocks must start as molten material.- Sedimentary: These rocks are formed by other broken rocks.- Metamorphic: These rocks changed by pressure/temperature.Formation of:- How was the earth formed?o Inner planet was rocky, not frozen.o Approximately 4.53-4.57 billion years old.o The planet was created through colliding chunks of matter, which were attracted to one another through gravity.o The energy of the motion was converted into heat through the process known as differentiation. Differentiation: Heat caused the earth to melt and separate into layers of different densities. - How was the moon formed?o A planet the size of Mars collided with Eartho This contact sent out debris into space Earth’s gravity held pieces which rotated and formed together to create the moon as we know it today.- Continents: Rising, solidifying light rock cooling.- Oceans/Atmosphere:o Bombarded by comets (frozen gases)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Volatiles released by volcanism.- Heat Sources:o External Heat Engine: Solar energy from the sun is the driving force powering the weather and climatic conditions. Solar energy affects the atmosphere, hydrosphere, and biosphere.o Internal Heat Engine: The internal heat of the earth is energy trapped during planetesimal bombardment and heat generated by radioactive elements decaying deep with the earth. This internal heat affects the inner and outer core, the deep mantle as well as the asthenosphere and
View Full Document
Unlocking...