Intro to Space Week 4
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Why do planets orbit the sun?
Back
The sun's gravity keeps them in place.
2.
FLASHCARD QUESTION
Front
What event created all matter in the universe and spacetime?
Back
The Big Bang.
3.
FLASHCARD QUESTION
Front
What is the correct hierarchy of cosmic structures from largest to smallest?
Back
universe, galaxy, solar system, star, planet.
4.
FLASHCARD QUESTION
Front
In which galaxy do we live?
Back
Milky Way.
5.
FLASHCARD QUESTION
Front
What does it mean that the universe is expanding?
Back
All of the galaxies are spreading out, the universe must have started from a single point, and the universe is cooling down.
6.
FLASHCARD QUESTION
Front
What is gravity?
Back
A force that attracts two bodies towards each other, keeping planets in orbit around the sun.
7.
FLASHCARD QUESTION
Front
What is a galaxy?
Back
A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.
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