Grade 7 Science Solar System Worksheet – Flashcards
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The Earth's period of rotation
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1 day
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The Earth's period of revolution
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1 year
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One astronomical unit represents the average distance between the ___ and ___
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Earth and Sun
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Inner planets are called
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Terrestrial planets
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Outer planets are called
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Gas giants
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What is the largest planet in the solar system?
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Jupiter
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The smallest (lowest mass) planet in the solar system is
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Mercury
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Which planet has no atmosphere?
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Mercury
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What is the order of the planets from the sun ?
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto
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Which planets have the greenhouse effects?
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Venus and Earth
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Which planet has a period of rotation that is longer than it's period of revolution?
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Venus
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The crust of the Earth is made mostly of ___ and ___
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Oxygen and Silicone
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What is the shape of every planet's orbit?
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Elliptical
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The gases that the outer planets are mainly made of are ___ and ___
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Hydrogen and Helium
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Inner planets are made mostly of
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Rock and Metal
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Outer planets all have ___ and ___
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Rings and Large masses
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What is the rotation period of Mars?
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24 hours 39 minutes
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Which planet has a tilted axis?
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Uranus
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Triton is the largest moon of which planet?
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Neptune
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Pluto is ___ the size of Earth.
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2/3
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What are Pluto's three moons ?
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Charon, Hydra, and Nix
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Jupiter and Saturn are made mostly of what element?
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gases like Hydrogen and Helium
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What planet is approximately the same size as Earth?
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Venus
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What are the parts of a comet?
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Nucleus, Coma, Dust trail, Ion trail
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Where do most long period comets come from?
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Oart cloud
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Where do most short period comets come from
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Kulper belt
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What are depressions on planets that are caused by meteorite strikes called?
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Impact crater
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What is the largest asteroid in our solar system?
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Pallis
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The asteroid belt lies between the planets ___ and ___
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Mars and Jupiter
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The largest object in the Kuiper belt is___
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Make Make
