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!"ES_FC_AST#2QUIZ
!"FC ES Astronomy Quiz # 2 Review
Question | Answer |
---|---|
The solar system consists of many types of _____________ ______________. | celestial bodies |
There are essentially two types of planets in our solar system: rocky, ____________ planets and the _____ giants. | terrestrial , gas |
______________, Venus,________ , and Mars are the four ______________ terrestrial planets consist mostly of solid _________ . | Mercury, Earth, inner , rock |
Of the terrestrial planets, the Earth is most ____________ . | dense |
Venus is often called Earth’s twin because it’s _____________ is nearly identical. | size |
The _____________ belt divides the terrestrial and ______________ planets. | asteroid, Jovian |
The four outer planets, Jupiter, Saturn, Uranus, and Neptune, are _____ ________ consisting of thick, outer layers of _____________ materials (perhaps with small rocky cores). | gas giants , gaseous |
The outermost dwarf planet, Pluto, has an ___________ composition, but it appears to be solid and _____________________. | unknown , terrestrial |
Moons are natural _____________ of planets that vary widely in _______________ . | satellites , composition |
Comets ___________ the sun and consist mostly of frozen _________. | orbit, gas |
A comets gasses ___________ as they get farther from the sun and ___________ as they approach the sun in their orbits. | freeze, thaw |
___________________ are rocky or metallic __________ objects ranging in size from millimeters to kilometers. | Asteroids , iron |
Asteroids are the source of most _____________. | meteorites |
_______________ Laws govern planetary motion. | Kepler’s |
Models of the solar system have evolved from ___________________ to_________________ . | geocentric ,heliocentric |
There are different theories that explain the creation of the ____________ universe including the universe theory and the Big Bang theory. | oscillating, |
Astronomers use a unit called a _________ ____________ to measure distance in space. | light-year |
A light-year is the distance the light travels in _____________ ______________, or about 9.5 x 1012 kilometers. | one year, |
Much of our knowledge about the solar system is the result of ___________________ ______________ ________________. | space exploration efforts |
There have been many major events in space exploration from ____________ missions to unmanned _______________ ______________. | manned, robotic probes |
The ________ ___________ _________ is our best current model for the origin of the universe. | Big Bang theory |