Astronomy 1/2 way Unit Practice
Flashcard
•
Science
•
8th - 9th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
Which planet has an orbital period shorter than Earth?
Back
Mercury has an orbital period of about 88 Earth days, making it the planet with the shortest orbital period in the solar system.
2.
FLASHCARD QUESTION
Front
What is a massive and dense object from which not even light can escape?
Back
A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.
3.
FLASHCARD QUESTION
Front
In red shift, the wavelengths of light become:
Back
Longer. Red shift occurs when light from an object is stretched to longer wavelengths, indicating that the object is moving away from the observer.
4.
FLASHCARD QUESTION
Front
What is the term for the point where a planet is closest to the Sun?
Back
Perihelion is the point in the orbit of a planet where it is closest to the Sun.
5.
FLASHCARD QUESTION
Front
What type of galaxies have spiral arms that wind outward from the center?
Back
Spiral Galaxies are characterized by their spiral structure, with arms that extend outward from the center.
6.
FLASHCARD QUESTION
Front
What is the term for the point in a planet's orbit where it is farthest from the Sun?
Back
Aphelion is the point in the orbit of a planet where it is farthest from the Sun.
7.
FLASHCARD QUESTION
Front
What phenomenon occurs when light from distant galaxies shifts towards the red end of the spectrum?
Back
Redshift is the phenomenon where light from an object is shifted to longer wavelengths, indicating that the object is moving away from the observer.
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