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43 Cards in this Set
- Front
- Back
Which planets do not have solid surfaces?
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Jupiter, Saturn, Uranus and Neptune
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Which planet is furthest from the sun, what type of surface does it have and how is it now classified?
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Pluto, rocky, dwarf planet
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All Gas Giants have many ______, and ______, which are thin disks made of small particles of ice and rock.
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moons, rings
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_______ is the largest of all planets; its mass is about ___ times the mass of all other planets combined.
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Jupiter, 2.5
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Jupiter's atmosphere is thick and made mostly of ________ and _____.
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hydrogen and helium
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_______, the Giant Red spot on Jupiter, is a storm larger than ______.
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Stormy, Earth
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Describe Jupiter's structure.
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probably a dense core of rock and iron with a thick mantle of liquid
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Jupiter has __ (number) large moons that are all larger than Earth's moon and _______s of smaller moons.
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4, dozens
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What are Io, Europa, Ganymede and Callisto?
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Jupiter's 4 largest moons.
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________ probes show that Saturn has a thick atmosphere of mainly ______ and ______, like Jupiter. Mass of Saturn is less than that of ________.
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Voyager, hydrogen and helium, water
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Which planet has the most spectacular rings?
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Saturn
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One of Titans moons, called ____, is larger than Mercury. It has ___ (number) other moons that are smaller, but sitll over 1,000 km in diameter.
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Titan, 4
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Uranus is ___ times larger than Earth and is blue-green due to traces of _______ in the atmosphere.
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4, Methane
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Voyager sent back 2 images of Uranus that showed only a few _______.
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clouds
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Uranus is claculated to rotate in about ___ hours and is tilted about ____ degrees from vertical.
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17 hours, 90 degrees
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Uranus' five largest moons have ____, ______ surfaces and _____ flows.
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icy, cratered surfaces and lava flows
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Neptune is similar in size and color to _________.
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Uranus
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Neptune has _____ on its surface and _______ in its atmosphere.
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clouds, storms
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Neptune was discovered as a result of a mathematical prediction based on what?
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Uranus' orbit
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Neptune has at least ___ (number) moons the largest of which is ________ which has a thin ________.
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13, Triton, atomosphere
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Which outer planet has a solid surface that is much denser than the other outer planets?
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Pluto
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Pluto is smaller than ______'s moon. It has ____ known moons, the largest is called _______.
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Earth, 3, Charon
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________ orbits the sun every 248 years and part of its orbit actually falls inside _________'s orbit.
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Pluto, Neptune
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______ are like a dirty snowball.
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Comets
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Comets orbit in very large ___________.
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ellipses
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The two parts of a comet are its ________ and its _____.
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head, tail
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A comet's head is made up of a ______, which is the solid inner core, and a _________, which is the cloud of dust and gas that form a fuzzy layer around the solid inner core.
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nucleus, coma
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A comet's tail has a ____ tail and a _____ tail which point away from the _____.
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gas, dust, sun
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What are two origins of comets?
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Kuiper belt, Oort cloud
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______ belt is a donut shpaed region between Neptune and about 100 times Earth's distance from the sun
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Kuiper
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_______ cloud is a spherical region that surrounds the solar system out to about 1,000 times the distance between Pluto and the Sun
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Oort
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_________ are rocky objects which are too small to be considered planets.
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Asteroids
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Asteroid _____ is made up of most asteroids that revolve around the sun between the orbits of _____ and _______.
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belt, Mars and Jupiter
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_________ are chunks of rock or dust in space that come from comets or asteroids.
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Meteoroids
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________ occur when meteorides enter Earth's atmosphere and create a streak of light
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Meteors
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_____ are meteors that strike the Earth's surface.
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meteorites
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____________ life is life that exists other than on Earth
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Extraterrestrial
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Life on Earth is made up on one or more ____, takes in ______ and uses it to grow and develop and gives off ______.
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cell, energy, wast
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The "Goldilocks Conditions" that are needed for life include what three conditions?
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liquid water, suitable temperature range and atmosphere
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Extreme Conditions are conditions on earth that at one time were thought not able to __________ ______.
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support life.
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Name the one planet and one of Jupiter's moons that scientist believe may now or in the past have been able to support life.
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Mars, Europa
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Why do scientists believe Mars may once have been able to support life?
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evidence that it once had liquid water
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Why do scientists think Europa might now have life?
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Europa has a frozen surfacev with giant cracks due to volcanic activity. Scientists think that water might exist under the ice.
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