Chapter 8: Space Physics
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23 Terms
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Stars
________ initially form from a cloud of dust and gas called a nebula.
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force of gravity
The ________ pulls the dust and gas together to form a protostar.
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nuclear fusion
When the temperature gets high enough, hydrogen nuclei undergo ________ to form helium nuclei.
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Gravity
________ provides the force that create orbits.
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Dark energy
________ is thought to be responsible for the accelerated expansion of the universe.
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Artificial satellites
________ are satellites that humans have built.
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Heavier elements
________ (up to iron) are created in the core of the star.
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solar system
The ________ is all the stuff that orbits our Sun.
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dense core
The exploding supernova throws the outer layers of dust and gas into space, leaving a very ________ called a neutron star.
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super dense
If the star is massive enough, it will become a black hole- a(n) ________ point on space that not even light can escape from.
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circular orbits
The planets move around the Sun in almost ________ (the same goes for the moon orbiting the earth)
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Stars
________ and their life cycles produce and distribute all naturally occurring elements.
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Prostar
Force of gravity pulls the dust and gas together to form a prostar
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Main Sequence Stars
Enters long stable period where the outward pressure and force gravity balance
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Supernovas
Big stars glow more brightly as they undergo more fusion and expand and contract several times
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Black hole
If star is massive enough, it turns into a black hole
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Planets
Mercury, Venus, Saturn, Neptune, Earth, Uranus, Jupiter,
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Dwarf planets
like Pluto, dont meet all rules for being a planet
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Moons
orbit planets, natural satellites
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Artificial satellites
man-made, that generally orbit earth
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Nebula
stars initially form from a cloud of dust and gass
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Red-shift
Thought that the universe is expanding
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Big bang
The universe started with a bang of a tiny space of very dense matter
