List of vocab words of the universe formation
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each of the black spaces below before clicking
on it to display the answer.
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Define Asteroid | rocky remnantof the early solar system found mostly in the asteroid belt.
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Define Asteroid Impact | An impact event is the collision of a large asteroid with the earth or another planet.
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Define Galaxy | A system of millions/billions of stars together with gas and dust held together by a gravitational attraction.
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Define hydrogen | A colorless, highly flammable, odorless gas.
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Define Mass | a measure of the resistance an object has to change in its velocity.
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Define Milky Way | Our galaxy, on Orion's Arm
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Define Orbit | The curved path a celestial object around a star, planet, or moon.
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Define Planet | A celestial body moving in an elliptical orbit around a star.
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Define revolution | the curved path of a celestial ovject around the sun.
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Define rotataion | the action of rotating around and axis or center.
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Define Solar System | The collectionn of planets and their moons in orbit around a sun together with smaller bodies like asteroids, meteroids, and comets.
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Define Sun | A medium sized star.
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Define Universe | All exting matter and space considered as a whole.
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What is the age of the universe? | 13.7 billions years old.
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Define Astronomical Distance | Distance between Earth and the Sun.
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What is the Big Bang Theory? | The theory that the universe began as a point and has been expanding since.
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Define Cosmic Microwave Background. | The cooled remnant of the hot big band that fills the entire universe and can be observed today.
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Define Expansion of the universe | The observation in physical cosmology that the velocity at which various galaxies are receding from the Earth.
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What evidence is there of the Big Bang Theory? | Expansion of the Universe and Cosmic Microwave Background.
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Define Ga | Billiono of Years ago.
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Define light year | A measurement, not time. The distance light travels in one year.
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Define Nebula | The formation of a star that begins with a cloud of interstellar gas and dust that collapses on its self
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Define Nova | Star stage of Explosion
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Define Nuclear fusion | H->He
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What is the speed of light? | 300,000 km/sec 186,000 miles/sec
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How does a star form? | When dense parts of molecular clouds collapse into a ball of plasma to form a star.
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Define Protostar | A disk shape with a hot condensed object in the center.
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Define Astronomy | The branch of science that deals with celestial objects, space, and the physcial universe as a whole.
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Define cosmology | the study of the universe, it's nature, origin, and evolution.
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Define Celestial | Relating to the sky, or outer space as observed in astronomy.
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