Big Bang Flashcard
Flashcard
•
Science
•
9th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the cosmic microwave background radiation (CMB)?
Back
The CMB is the remaining energy from the Big Bang, filling the universe and providing evidence for the Big Bang theory.
2.
FLASHCARD QUESTION
Front
What does it mean that the universe is expanding?
Back
It means that all galaxies are moving away from each other, indicating that the universe started from a single point and is cooling down.
3.
FLASHCARD QUESTION
Front
What happens to spectral lines when a star moves towards an observer?
Back
The spectral lines are shifted towards the blue light, indicating that the star is moving closer.
4.
FLASHCARD QUESTION
Front
What are two pieces of evidence for the current theory of the universe?
Back
Redshift and cosmic microwave background radiation (CMB) are two key pieces of evidence.
5.
FLASHCARD QUESTION
Front
What is redshift?
Back
Redshift is the phenomenon where light from an object moving away from an observer is shifted to longer wavelengths, making it appear redder.
6.
FLASHCARD QUESTION
Front
What is blueshift?
Back
Blueshift is the phenomenon where light from an object moving towards an observer is shifted to shorter wavelengths, making it appear bluer.
7.
FLASHCARD QUESTION
Front
What is the significance of the Doppler effect in astronomy?
Back
The Doppler effect helps astronomers determine whether an object in space is moving towards or away from us based on the shift in its spectral lines.
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