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How did the Universe Form?

How did the Universe Form?. The universe formed 14 billion years ago from an explosion referred to as the Big Bang The universe is constantly expanding http://www.brainpop.com/science/space/bigbang/zoom.weml. How did our solar system form?.

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How did the Universe Form?

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  1. How did the Universe Form?

  2. The universe formed 14 billion years ago from an explosion referred to as the Big Bang • The universe is constantly expanding • http://www.brainpop.com/science/space/bigbang/zoom.weml

  3. How did our solar system form? • Our solar system formed when the Big Bang explosion cooled.

  4. How did Earth form? • Earth formed when dust, gases, and ice particles from the Big Bang collided, 4.6 billion years ago (4,600 million years ago). • http://www.teachersdomain.org/ext/ess05_img_walloftime/index.html

  5. What keeps Earth from being bombarded with space debris? • Earth’s atmosphere and magnetic field protects it from being bombarded by space debris.

  6. When did humans appear on Earth? • Humans appeared on Earth very, very recently; about 100,000 years ago.

  7. How do we know what life existed on Earth before humans? • Fossils tell us what life forms existed before humans.

  8. What is a fossil? • http://www.brainpop.com/science/diversityoflife/fossils/quiz/

  9. A fossil is… • Body fossil- • Trace fossil- • Mold- • Cast- • Petrified fossil-

  10. A fossil is the preserved remains or traces of an organism that lived in the past.

  11. Body fossil- part of original organism that has been preserved; ex: bug in amber, mammoth in ice; saber-toothed tiger in tar pit

  12. Petrified fossil- formed when minerals slowly replace an organism

  13. Mold- hollow print, impression in sediment which turns to rock

  14. Cast- when minerals fill in a mold and harden into rock; 3-D

  15. Trace fossil- footprints, nests, bite marks, poop (what an animal could leave behind)

  16. How are fossils formed? • http://www.teachersdomain.org/folder/view/3748/

  17. How can we find out how old a fossil is? • http://www.teachersdomain.org/resource/tdc02.sci.phys.matter.radiodating/

  18. What can fossils tell you about how life changed through time?

  19. What are some things that you want to understand better about fossils and changes in life through time?

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