General Astronomy Quiz 9 Flashcards

1
Q

What are the four outer planets?

A

Jupiter, Saturn, Uranus, Neptune

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2
Q

Do the outer planets have solid surfaces?

A

No

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3
Q

What is another name for outer planets?

A

Gas giants

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4
Q

What determines Jupiter’s temperature?

A

Its location and altitude

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5
Q

What is the temperature of the cloud tops on Jupiter?

A

About -145 degrees Celsius (-234 degrees Fahrenheit)

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6
Q

What are the outer planets mainly composed of?

A

Hydrogen and helium

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7
Q

Why do outer planets have thick atmospheres?

A

Due to gravity, which keeps gases from escaping into space

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8
Q

What causes outer planets to have a stronger gravitational force?

A

Their massive size

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9
Q

Do all the gas giants have many moons and rings?

A

Yes

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10
Q

What is a ring?

A

A thin disc of small particles of ice and rock

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11
Q

Which planet is the largest and most massive?

A

Jupiter

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12
Q

What is one feature that Jupiter is well known for?

A

The Great Red Spot

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13
Q

What is the Great Red Spot?

A

A storm on Jupiter that is larger than Earth

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14
Q

Why can’t the storm be weaken?

A

Jupiter has no land to weaken it

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15
Q

What do astronomers think about Jupiter?

A

They believe it has a dense core of rock and iron at its center surrounded by a thick mantle of hydrogen and helium

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16
Q

What are Jupiter’s main moons?

A

-Io
-Europa
-Ganymede
-Callisto

17
Q

Which planet is the second largest in our Solar System?

18
Q

What is Saturn’s surface temperature?

A

-220 degrees. Fahrenheit (-140 degrees Celsius)

19
Q

Does Saturn have storms?

A

Yes, but they are not as big as Jupiter’s

20
Q

How would you describe Saturn’s rings?

A

Broad and thin, like a CD

21
Q

How do Saturn’s rings orbit?

A

In their OWN orbit around the planet

22
Q

What is Saturn’s largest moon?

A

Titan, it is larger than Mercury

23
Q

Uranus is ____ times the diameter of Earth

24
Q

What planet is the coldest in our Solar System?

25
Are Uranus' rings darker than Saturn's?
Yes
26
How often do Uranus' clouds rotate?
Every 17 hours
27
How is Uranus' axis of rotation tilted?
At an angle about 90 degrees from the vertical (top to bottom)
28
What does Uranus' five largest moons have?
-Icy, cratered surfaces -Lava flows which suggest material erupted inside of the moons
29
How many moons do astronomers believe Uranus has?
27
30
What do scientists believe about Neptune?
It is slowly shrinking which is causing its interior to heat up which produces clouds and storms
31
What did Neptune have at some time?
A Great Dark Spot
32
What happened to Neptune's Dark Spot?
The storm didn't last very long and disappeared, but other storms come and go
33
How many moons do astronomers believe orbit Neptune?
About 13
34
What is Neptune's largest moon?
Triton, it has a thin atmosphere
35
What is the region near Triton's south pole covered in?
Nitrogen ice
36
What was the Solar System's first planet?
Jupiter