Week #8 Presentations

 Lab Notes: 

Origin of the Universe  

  • Scientists believe the universe is 13.7 billion years old 
    • Before this there was nothing  
  • Big bang theory – there was no bang because there was no light  
    • Light came into existence 300,000 years later 
    • Created gravity, heat, light  
  • We do not know for sure and will never know – we will have the best theory  
    • Theory that is damn near proven but never true  

  • Small particles come together which led to stars and then galaxies and then us  

Lifecycle of stars  

Galaxies  

  • Consists of stars, planets, and vast clouds of gas and dust, bond together by gravity 
  • Oldest galaxies formed when our universe was only 1 billion years old 
  • Our galaxy will eventually collide with andromeda galaxy 
  • Milky way is 100,00 light years big 
  • There are 2 trillion galaxies  
  • Definition: hundreds and hundreds of thousands of stars  
    • 2 billion stars  

Origin of the Earth  

  • Originally a sphere of molten lava  
  • Over millions of years, it began to cool causing oceans  
  • Believed that asteroid showers created bodies of water  
  • Layers of atmosphere: Troposphere (holds our oxygen), stratosphere, mesosphere, thermosphere, and exosphere  
  • The earth came into being 4.6 billion years ago  

Black Holes 

  • Formed when massive stars collapse under their own gravity  
  • Nothing, not even light can escape  
  • Types: stellar mass, supermassive, and intermediate mass 
  • A black hole could fit in your pocket  
  • We do not know where all the blackholes in our universe are 
  • 40 quintillion black holes in the universe  
  • There is a black hole in the center of the Milkyway galaxy, and it causes all the stars and planets to rotate around it  

Exploration of space: past, present, and future  

  • October 4th 1957, was the first space travel: the U.S.S.R launched Sputnik the first official satellite to orbit Earth 
  • April 12th 1961, first person in space, went around the Earth and took 108 minutes  
  • July 20th 1969 Neil Armstrong landed on the moon  
  • Expedition 70: went to the international space station in September of 2023 and will return in spring 2024 
  • Space tourism  
    • People can go to space for a big price  
  • Private space travel  
    • Space exploration that takes place outside of the government  
  • Future: not racing other people to get to space or make new discoveries  
    • Orion spacecraft – 4 people on board will last 21 days  
    • Dream chaser – research and supplies to the international space station 
    • Parker solar probe: goal is to touch the sun  

Lecture Notes:
Origin of the universe: 13.7 billion years ago the universe was created by the Big Bang but Earth was not. Nothing which was really a tiny thing the size of our pencil eraser inflated to create our universe in a fraction of a second. Eventually, it will collapse back to nothing again. This process will repeat but not in our lifetime. Our sun formed from a stellar nebula, most likely from a star that underwent a supernova (when a star blows up). This is how we get the rest of the periodic table (a supernova blowing up). In about 5 billion years the Earth will be gobbled up by the sun because it will burn out. As the sun burns up its fuel, the overall mass goes down. This then decreases the gravity and causes the sun to inflate and then go poof.

The life cycle of stars: A cloud of dust goes to a big or normal-sized star, and both turn into a red giant, they go to this because they lose their material causing them to inflate. A big star when it explodes goes to either a black hole or a neutron star, a regular star changes to a white dwarf. A star lives longer the smaller it is.

Origin of the Earth: Created from a star that lived its entire existence and then blew up and created Earth from its stardust. The iron core of the Earth protects us from being burnt completely by the sun. The creation of the moon tilted the Earth which then caused seasons.

Galaxies: Three primary shapes of galaxies: Spiral, elliptical, and irregular. Our galaxy is a spiral galaxy. Other life on other planets in different galaxies is possible. Our galaxy moves.

Black holes: Super dense, you see it by the absence of itself. In the center of galaxies. Nothing including light can escape.

Comments

Post a Comment

Popular posts from this blog

Week 11

Image
  What did you learn this week?  This week we learned about observation and explanation. We got to observe a few different science experiments. We also made a few predictions. After we made observations and talked about the different kinds of observation (quantitative and qualitative), we tried to explain why what we observed happened which is the explanation.  How can you apply what you've learned to your teaching in the future? I can apply science stations to my classroom in the future. I really liked the idea of doing each experiment and just doing quick little things that are different from each other but are also teaching the same concept.  What are new or remaining questions?  I have a few remaining questions that all have to do with the science stations we went through. Would Coke Zero sink or float in a big can? Were any new chemicals formed when we added baking soda to the vinegar? 
Read more

Week 12

Image
  What did you learn this week? This week we learned about mass, volume, conductors, and insulators. We used water in a cylinder beaker to determine the volume of an item. There were differences between the items and differences between the sizes of items which makes for different volumes. I also learned that to accurately determine the volume you have to completely submerge the object you are testing.  How can you apply what you've learned to your teaching in the future? I could see myself using these activities in my future classroom. I especially liked the sink-or-float aspect of the lesson. This was enjoyable and fun. I think students would stay engaged if they did an activity like this.  What are new or remaining questions?  A remaining question I have is how long this activity would take for kids? My group only partially finished our activities and in total it took around 40 minutes for us to do. That's why I was curious about the time frame it would take for our students
Read more

Week 13

Image
  What did you learn this week? This week we learned about density and why some objects have more density than others. We also talked about science models and what a science model may consist of or what it may look like. We discussed that models display a hypothesis.  Which parts did you find clear and which were confusing? One part I found confusing was the reason behind one color of M&M's mixing with the water faster. I hypothesized that the yellow would mix with the water the fastest and I was right but I do not necessarily know why. This was similar to my hypothesis of warm water going faster than cold, which I was also right about but not 100% sure why.  How can you apply what you've learned to your teaching in the future? I can use this lab in the classroom in the future. I really liked the idea of an independent study of the students figuring out how they are going to reach their answers. This makes them more involved in their work since they are determining what the
Read more