Life Cycle of Stars 1

Life Cycle of Stars 1

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Storyboard Description

For science- cosmology

Storyboard Text

  • When you look up at the sky, space is studded with beautiful stars. But how did they get there?
  • A long, long time ago, 13.7 billion years ago to be exact, something huge happened. This event is known as the big bang. The big bang was an explosion that created the entire universe!
  • BOOM!
  • Hydrogen atom
  • Proton- carries a positive chargeand will push away from any other positive charges. "opposites attract."
  • This is an atom. Atoms were created in the big bang. For nearly 200 million years, there was nothing but protons, neutrons, and electrons coming together to form atoms. 75% of the universe consisted of hydrogen atoms, because they were the easiest to make. Just one proton and one electron. 25% of the universe consisted of helium, and the other 10% was a mixture of other things.
  • Electron- stays in a rotation around the proton.
  • Time was passing and nothing was really happening. Matter and energy were distributed evenly throughout the whole universe and it became very difficult for something to happen. However, even slight differences in temperature or mass could spark a change.
  • Soon, the atoms clumped together create friction. When friction is created, the temperature rises. Eventually, when the temperature reaches 3,000 degrees, the atoms can't hold together anymore. But it keeps going.
  • As you may know, gravity is stronger when things are closer together, or denser. As these atoms began pulling closer together, they got denser. And their continual gravitational pull roped in more atoms, which creates a higher density, which creates a higher mass, and so on.
  • Eventually, the temperature keeps rising and rising faster and faster. The temperature eventually will reach 10 million degrees. When that happens, the protons inside of atoms overcome their magnetism of "opposites attract" and they begin to fuse together. This is called nuclear fusion, because the nuclei in the atoms fuse together. This creates a huge release of energy.
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