
Ch. 28 The Planets 50 Questions
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What causes a spinning nebular cloud to flatten into a disk?
Back
Increased gravitational pull at the center of the disk.
2.
FLASHCARD QUESTION
Front
What is the origin of comets?
Back
Comets come from the Oort cloud.
3.
FLASHCARD QUESTION
Front
Which planet is known to be shrinking and what is the reason for this?
Back
Mercury is shrinking due to its large, hot core.
4.
FLASHCARD QUESTION
Front
Which two planets have atmospheres that are very similar in composition to the Sun?
Back
Jupiter and Saturn.
5.
FLASHCARD QUESTION
Front
Which planet has the greatest orbital eccentricity?
Back
Mercury.
6.
FLASHCARD QUESTION
Front
What is the definition of gravitational pull?
Back
The force of attraction between two masses, which causes objects to be drawn towards each other.
7.
FLASHCARD QUESTION
Front
What is the Oort cloud?
Back
A theoretical cloud of predominantly icy objects that exist in the outermost reaches of the solar system, believed to be the source of long-period comets.
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