What is dark matter?
Formation of the Milky Way

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Science
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8th - 12th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
Dark matter is a form of matter that does not emit, reflect, or absorb light, making it invisible and detectable only through its gravitational effects.
2.
FLASHCARD QUESTION
Front
How can dark matter be detected?
Back
Dark matter can be detected when galaxies collide, as the gravitational effects of dark matter influence the motion of visible matter.
3.
FLASHCARD QUESTION
Front
What is Kepler's third law?
Back
Kepler's third law states that the square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
4.
FLASHCARD QUESTION
Front
How can Kepler's third law be modified for galaxies?
Back
Kepler's third law can be modified to apply to the mass of stars orbiting in a galaxy, relating their orbital periods to their distances from the galactic center.
5.
FLASHCARD QUESTION
Front
What is the structure of the Milky Way?
Back
The Milky Way has at least 5 major spiral arms, which are regions of higher density of stars and gas.
6.
FLASHCARD QUESTION
Front
How do stars orbit in the Milky Way?
Back
The vast majority of stars in the Milky Way orbit in mostly one direction around the central bulge.
7.
FLASHCARD QUESTION
Front
What role does dark matter play in galaxy formation?
Back
Dark matter provides the gravitational framework necessary for the formation and stability of galaxies.
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