Week 8

 What did you do in lab today?

- If it is the winter solstice in Iowa, how much sunlight is on the South Pole? About 24 hours of sunlight because we in Iowa have shorter daylight days, so the South Pole is getting all sunlight. 

- what materials make up new stars? Hydrogen, Helium, and materials from stars that have died. 

- we learned about black holes, galaxies, how stars are created, origin of the universe, origin of the earth, and space travel 

- there is a black hole at the center of our galaxy that we are rotating around

What was the big question?

- Solar System AND Team Sharing 

What did you learn in Thursday’s discussion?

Questions:

  1. If you are standing on the Tropic of Cancer during the summer solstice for Iowa, what direction does your shadow point? You don’t have a shadow because the sun is directly above you. If you were in Iowa at that time, your shadow would be pointing north. 


  1. Geocentric: earth is in the center. Heliocentric: sun is in the center

  2. It’s almost noon in Iowa. If the moon was just setting, what phase would it be? Quarter moon


Origin of the Universe Big Bang:

  • 13.7 billion years ago there was nothing and nowhere.

  • A subatomic particle inflated to an unimaginably huge size in a fraction of a second. 

  • Expansion not an explosion. 

  • Time and space were created.

  • The earth was not created in the Big Bang


Stars:

  • light didn’t “happen” until about 300,000 years after the Big Bang

  • Stars and galaxies began to form about 12.7 billion years ago

  • Our star (sun) formed from a stellar nebula (dust and debris) most likely from a star that underwent a supernova.

  • Ours is 4.65 billion years old and is about half-way through its full supply 

  • Red giants burn fuel and lose mass, therefore increasing its size due to less mass 

  • Nuclear fission — stars can make up to IRON on the periodic table of elements 

  • Where did everything else come from??


     


Read the online textbook, chapter 5: https://pressbooks.uiowa.edu/methodsii/chapter/earth/


What did you learn?

- the Big Bang was an expansion, not an explosion. 

- Edwin Hubble discovered that the universe is still expanding today. If it is constantly expanding and growing now, that means it was smaller before–and likely the size of an unimaginably small particle at the beginning.

What was most helpful?



What do you need more information on?

- I am still confused about the moon cycles and figuring out when they are what they are. I wish we could just have a bunch of quiz questions in class about them so I could get more practice because I feel like they are really hard to wrap my head around them since I can’t just see it everyday. 

What questions, concerns, and/or comments do you have?

None right now.

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