Protoplanet Theory - PowerPoint PPT Presentation

1 / 13
About This Presentation
Title:

Protoplanet Theory

Description:

Lithosphere-The outer layer of Earth's structure made up of the crust and solid ... Asthenosphere-The layer below the lithosphere that is made up of the rest of the ... – PowerPoint PPT presentation

Number of Views:1139
Avg rating:3.0/5.0
Slides: 14
Provided by: kensto6
Category:

less

Transcript and Presenter's Notes

Title: Protoplanet Theory


1
Earths Structure
  • Protoplanet Theory
  • Earths Interior Layers
  • Formation of oceans and continents

2
Vocabulary
Crust-The outer layer of the Earth Mantle-The
thick portion of Earth's structure in between the
crust and the core Outer core-The heated section
of the Earth located in between the mantle and
the inner core Inner core-The deepest ,
innermost section of Earth's structure made up of
extremely hot iron and nickel
3
Vocabulary Continued
Lithosphere-The outer layer of Earth's structure
made up of the crust and solid parts of the
mantle Asthenosphere-The layer below the
lithosphere that is made up of the rest of the
mantle that has rocks that are only partially
melted
4
Vocabulary Continued
Silicates-A mineral made with silicon and oxygen
that makes up most of Earth's crust Protoplanet
Theory- The idea of a rotating cloud of dust
creating the Solar System
5
Notes Earths Interior Layers
  • Crust- The thin rocky crust, is the outer layer
    of the earth, and is about 22 km thick.
  • Mantle-The mantle is the second layer of the
    earth structure, it is comprised of two parts the
    upper solid parts of the mantle called the
    lithosphere floats on the softer bottom layer
    called the asthenosphere , all together the
    mantle is about 3000km thick.

6
Continued...
  • Outer Core-The outer core, which is around 2200km
    thick, is molten rock which rotates around the
    core causing earth's magnetic field.
  • Inner Core-The earth's inner core,
  • which is 1250 km thick, is the
  • hottest layer but the pressure is so
  • great that it does not melt.

7
Protoplanet Theory
  • A rotating cloud of dust starts to collapse.
    Then an instability in the cloud causes the dust
    to form balls.
  • The the balls collide to form even bigger balls.
  • One ball becomes big and hot enough to become a
    star.
  • The star final sucks all the
  • gas to the inner part of the
  • solar system to form the
  • planets while the rest of
  • the dust is blown away.

8
Formation of oceans and continents
  • 200 million years ago there was the super
    continent of pangea.
  • This was formed most likely by volcanic
    outbursts between 2.5 and 3 million years ago
    where around 70 of the land mass was formed.
  • At this tie the rest of the earth was covered
    with water.
  • Then 180 years ago pangea broke into two parts.
    The north had North America, Europe, and Asia in
    it.

9
continued...
  • The southern had Africa, South America, India,
    Australia, and Antarctica in it.
  • Then 135 million years ago
  • the individual continent broke
  • apart and moved to there
  • current positions over
  • millions of years, and they
  • are still moving today.

10
Historical Information
  • The Earth was created about 4.54 billion years
    ago
  • Material like iron sank to the core of the earth
    and lighter silicates and water rose to the
    surface.
  • At one point the Earth's surface consisted of
    only molten lava.
  • David Stevenson was one of the people who helped
    discover about the structure of the earth and how
    the Earth was created.

11
Real Life Applications
  • Geoscientists take care of Earth's resources and
    environment.
  • They work to understand natural happenings on
    Earth and other planets.
  • They investigate the land, oceans, and atmosphere
    on Earth
  • They can help in predicting weather and finding
    new useful materials on Earth
  • Geoscientists are important scientists who help
    our world discover new things about Earth's
    history and future

12
demonstration
  • Fill out, and label the diagram of the earths
    structure.

13
Bibliography
  • Blanchard, Donald. "The Making of a
    Supercontinent." Novermber 2005. 3 Oct 2007
    lthttp//webspinners.com/dlblanc/tectonic/pangea.ph
    pgt.
  • "structure of the Earth." structure of the Earth.
    Auguest 14, 1998. 3 Oct 2007 lthttp//scign.jpl.nas
    a.gov/learn/plate1.htmlgt.
  • "structure of the earth." The Southern California
    Integrated GPS Network Education Module. 8/14/98.
    LLC, Maggie Glasscoe. 3 Oct 2007
    lthttp//scign.jpl.nasa.gov/learn/plate1.htm gt.
  • " dictionary results ." dictionary.com . 2007 .
    Lexico Publishing Group. 3 Oct 2007
    lthttp//dictionary.reference.com/gt.
  • " Careers in Geoscience." Careers in Geoscience.
    is not given. American Geological Institute, and
    American Association of Petroleum Geologists. 3
    Oct 2007 lthttp///www.earthscienceworld.org/careee
    rs//brochure.html/gt.
Write a Comment
User Comments (0)
About PowerShow.com