Unit 1: Astronomy Review
Flashcard
•
Science
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an orbital period?
Back
The time it takes a planetary object to complete one orbit.
2.
FLASHCARD QUESTION
Front
What is the term for the longest diameter of an ellipse?
Back
Semi-Major Axis.
3.
FLASHCARD QUESTION
Front
Why do we see lightning before we hear thunder?
Back
Light waves travel faster than sound waves.
4.
FLASHCARD QUESTION
Front
What process powers the Sun?
Back
Fusion.
5.
FLASHCARD QUESTION
Front
What is the difference between a planet's orbital period and its speed?
Back
Orbital period is the time taken to complete one orbit, while speed is the distance traveled in that time.
6.
FLASHCARD QUESTION
Front
What is the shape of a planet's orbit?
Back
Elliptical.
7.
FLASHCARD QUESTION
Front
What is the significance of the semi-minor axis in an ellipse?
Back
It is the shortest diameter of the ellipse.
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