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Origin of the Universe

This is about the origin of the universe.

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Origin of the Universe

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  1. Origin of the Universe Earth and Life Science Grade 11

  2. Origin of the Universe Big Bang Theory • The cosmological theory that all matter and energy in the universe originated from a state of enormous density and temperature that exploded at a finite moment in the past when space and time came into being. (A dictionary of Science 6th Edition)

  3. Origin of the Solar System Nebular Theory • States that the bodies of our solar system evolved from an enormous rotating cloud called solar nebula

  4. Solar Nebula • Made up of Hydrogen and Helium atoms • Microscopic dust grains and ejected matter of long-dead stars • Nuclear fusion in stars convert hydrogen and helium into other elements found in the universe

  5. 5 Billion Years Ago • Clouds of gases and heavier elements • Slowly contract due to gravitational force among its particles • Spiralling nebula contracts and rotates faster • Inward pull of the gravity came into balance • Vast cloud has assumed a flat disk shape • Protosun - center

  6. Gravitational energy was converted to thermal energy • High temperature – dust grains broke up into molecules and atomic particles • Distance beyond Mars – Low temperature and has thick layer of ice • Formation of the sun – end of the period of contracting

  7. Temperature in the inner planets began to decline • Substances with high melting points began to coalesce(join together) • Iron, nickel and elements of rocks – silicon, sodium, calcium formed metallic and rocky clumps that orbit the sun • Inner planets – high temperature • Outer planets – low temperature (ice)

  8. QUIZ 1. It is a cosmological theory that describes the origin of the universe. Nebula Star Nebula Solar Nebula Big Bang

  9. QUIZ 2. It describes the origin of the solar system? Solar Theory Nebular Theory Star Theory Big Bang Theory

  10. QUIZ 3. Which of the following gases are found in the solar nebula? Helium and Oxygen Nitrogen and Oxygen Hydrogen and Helium Hydrogen and Nitrogen

  11. QUIZ 4. Which of the following force will make the gases contract in the spiralling nebula? Gravitational Force Electrical Force Chemical Force Mechanical Force

  12. QUIZ 5. Which planets will have the higher temperature? Small planets Big planets Outer planets Inner planets

  13. ANSWERS

  14. QUIZ 1. It is a cosmological theory that describes the origin of the universe. Nebula Star Nebula Solar Nebula Big Bang Big Bang

  15. QUIZ 2. It describes the origin of the solar system? Solar Theory Nebular Theory Nebular Theory Star Theory Big Bang Theory

  16. QUIZ 3. Which of the following gases are found in the solar nebula? Helium and Oxygen Nitrogen and Oxygen Hydrogen and Helium Hydrogen and Nitrogen Hydrogen and Helium

  17. QUIZ 4. Which of the following force will make the gases contract in the spiralling nebula? Gravitational Force Electrical Force Gravitational Force Chemical Force Mechanical Force

  18. QUIZ 5. Which planets will have the higher temperature? Small planets Big planets Outer planets Inner planets Inner planets

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