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ESCI - 1210 Earth Science Week 1

by: Ryan Linska

ESCI - 1210 Earth Science Week 1 ESCI 1210

Marketplace > Macomb Community College > Science > ESCI 1210 > ESCI 1210 Earth Science Week 1
Ryan Linska
Macomb Community College

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About this Document

These notes cover the basis of the first week of ESCI -1210, Earth Science, week 1
Earth Science
Gregory D. Barrows
Class Notes
EARTH, Science, natural
25 ?




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This 5 page Class Notes was uploaded by Ryan Linska on Wednesday September 7, 2016. The Class Notes belongs to ESCI 1210 at Macomb Community College taught by Gregory D. Barrows in Fall 2016. Since its upload, it has received 11 views. For similar materials see Earth Science in Science at Macomb Community College.

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Date Created: 09/07/16
ESCI – 1210 – Natural Science 1210 Fall 2016 George Barrows Week 1 – 08/24/2016 An Overview of Earth Science: What is Earth Science? ­ All sciences that seek to understand the Earth ­ Includes the understanding of the Earth’s neighbors in space. ­ Also includes many other scientific fields: o Geology: the study of the Earth o Oceanography: the study of the ocean o Meteorology: the study of the atmosphere/weather o Astronomy: the study of the universe o Environmental Science: the study of natural hazards,  resources, and peoples influence on Earth’s processes. Geologic Time ­ The span of all time since the Earth was formed. (Approx. 2.6  billion years old. Geologic Time Scale ­ The time scale that divides Earth’s history into different sections. Scientific Inquiry ­ Science assumes that the natural world is: o Consistent; events occur in the same way all the time o Predictable; these events can be predicted to happen in the  same fashion. ­ The goal of science is: o To discover patterns in nature o To use this knowledge to predict these patterns in the future What can an idea become? ­ Hypothesis: a tentative or untested prediction ­ Theory: a tested and confirmed hypothesis ­ Paradigm: a theory that explains a large number of interrelated  aspects of the natural world. Scientific Method ­ Gathers facts through observation ­ Helps formulate hypothesis and theories. ­ This scientific knowledge is gained through o Collecting facts o Testing hypothesis o Experimentation o Developing theories The Evolution of Earth ­ Nebular theory o The theory that the solar system evolved from an enormous  rotating cloud called the solar nebula.  Comprised of mostly hydrogen and helium  Occurred about 5 billion years ago  Took the shape of a disc with a proto­sun at the center  The inner planets formed from the metallic and rocky  clumps within the disc­like nebula  The rest of the planets formed from fragments of icy  materials ­ Formation of the Earth’s layered structure o The decay of the radioactive elements and heat from high  velocity impacts on the Earth’s surface caused the  temperature to increase  Iron and nickel sank to the center  The lighter materials floated to the top.  Gases escaped to form a proto­atmosphere Earth’s Spheres ­ Hydrosphere o Encompasses all of the water on Earth. ­ Atmosphere o The thin, tenuous layer of air above the Earth’s surface ­ Biosphere o Includes all life on Earth  Consists of the ocean floor all the way to several  kilometers into the Earth’s atmosphere. ­ Geosphere o Solid earth  From the Earth’s surface to the Earth’s core  The largest of Earth’s surface  Consists of the: crust, mantle, and core.  These layers are divided based on how the materials  within these surfaces behave. Geosphere ­ Crust o Thick, rocky outer skin o Continental Crust; less dense o Oceanic Crust; dense, consists of basaltic rock ­ Mantle o Solid, rocky shell o Upper Mantle & Lower Mantle  Lithosphere; entire crust, hard layer  Asthenosphere; soft layer ­ Core o Consists of iron and nickel o Outer core  Mostly liquid, produces magnetic field. o Inner core  Solid  The Mobile Geosphere ­ Plate tectonics o The lithosphere is broken into plates which are in motion ­ Three plate boundaries o Divergent; pull apart o Convergent; move together o Transform fault; slide past one another Face of the Earth ­ Continents o Composed of granitic rock ­ Ocean basins o Composed of basaltic rock


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