Earth Science – Unit 1: Origin Of The Earth QUIZ 2 – Flashcards
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I believe that our solar system formed by the same process as star formation. A huge cloud of dust and gas collapsed and condensed. Gravity pulled matter into the center core, nuclear fusion began, and our Sun was created. Remaining matter and gas clumped together to form the planets. I believe in the _____.
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A: nebular theory
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The following is current scientific evidence supporting the nebular theory on the formation of the solar system.
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A: the composition of the inner and outer planets, current observations of star formation, and the motion of the solar system
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_____ describes the life cycle of a star.
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A: Stellar evolution
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The death of a star occurs when its _____ stops.
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A: nuclear fusion
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According to the condensation theory, the most important factor for the formation of our planets was _____.
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A: the interstellar dust attracting heat away from the protosun
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1.Kepler's 1st law: law of ellipses 2.Kepler's 2nd law: law of equal areas 3.Kepler's 3rd law: harmonic law 4.Newton's 1st law of motion 5.Newton's 2nd law of motion 6.Newton's 3rd law of motion 7.Newton's law of universal gravitation
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1. The orbit of planets is not circular but elliptical. 2.An imaginary line joining a planet to the Sun sweeps out equal areas in equal amounts of time. 3.Planets closer to the Sun orbit it in a shorter time period than planets further from the Sun. 4.Stationary objects resist movement, and moving objects resist stopping. 5.Acceleration of an object depends on its mass and applied force. 6.For every action, there is an equal and opposite reaction. 7.The greater the mass, the stronger the gravitational force. The greater the distance, the weaker the gravitational force.
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Historical models of the solar system included a ______ model or earth-centered universe and a ______ model or sun-centered universe.
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A: geocentric , heliocentric
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The law of equal areas indicates that planets travel ____ when they are closer to the Sun, and _____ when they are farther out from the Sun.
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A: faster, slower
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According to Newton's 2nd law of motion, Jim can throw a _____ farther than a _____.
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A: all of the above
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Which statement is true?
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A: Planets would travel in a straight line if it weren't for the force of the Sun's gravity.
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Newton's _____ law explains why my hands hurt when I clap loudly.
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A: 3rd
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When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction.
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A: 1st
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According to Kepler's law of harmonies, which of these planets takes the longest to orbit the Sun?
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A: Neptune
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According to Newton's law of universal gravitation, which of these objects would have the strongest gravitational force?
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A: a queen-sized bed
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Astronomers think planets formed from interstellar dust and gases that clumped together in a process called _____.
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A: planetary accretion
