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43 Cards in this Set

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