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D - Science - Ch 16

The Outer Planets

How are the four gas giants are similar? structure, atmosphere & rings
How are the four gas giants similar in structure? they do not have a solid surface
How are the four gas giants similar in atmosphere? they are thick and made up mainly of hydrogen and helium
How are the four gas giants similar in rings? each is surrounded by a set of rings
How are the gas giants alike? the size and mass of each are much greater than those of Earth
The four outer planets do not have solid ______________________. surface
Which four planets are known as the gas giants? Jupiter, Saturn, Uranus, and Neptune
What is the composition of the gas giants? their atmospheres are composed mainly of hydrogen and helium
What is the composition of the rings that surround the gas giants? made of small particles of ice and rock
What is the most massive planet in the solar system? Jupiter
What is the Great Red Spot on Jupiter? a storm that is larger than Earth and has winds that blow hundreds of kilometers per hour
What are Jupiter ’s four largest moons? Io, Europa, Ganymede & Callisto
What is Jupiter ’s moon Io covered with? active volcanoes
What are Saturn’s rings made of? chunks of ice and rock, each traveling in its own orbit around Saturn
What is the largest of Saturn’s moons? Titan
Why does Uranus look blue-green? there are traces of methane in its atmosphere
How much larger is Uranus than Earth? about four times the diameter of Earth
What discovery made astronomer William Herschel famous? he discovered the planet Uranus, the first new planet discovered since ancient times
How is the rotation of Uranus unlike that of most of the other planets? it rotates from top to bottom instead of from side to side, the way most of the other planets do
What are Uranus’s five largest moons like? They have icy, cratered surfaces and lava flows on their surfaces
Which spacecraft sent many images of Uranus back to Earth? Voyager 2
In the 1800s, how did astronomers predict that the planet Neptune would be discovered before anyone had seen it? Uranus was not quite following the orbit astronomers predicted for it, so they hypothesized that the gravity of another planet was affecting Uranus’s orbit
How is the Great Dark Spot like the Great Red Spot? both were probably storms
Which is the largest of Neptune’s moons? Triton
How often does Pluto revolve around the sun?
What is more than half of Pluto’s size? one of its moons
Why have astronomers decided that Pluto should no longer be called a planet? It is so small that it may be only the largest of thousands of objects revolving around the sun beyond Neptune
Created by: lprinke