
2024 Fall Semester Final Review - Part 2
Flashcard
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the Big Bang Theory?
Back
The Big Bang Theory is the leading explanation for the origin of the universe, proposing that it began as a singularity approximately 13.8 billion years ago and has been expanding ever since.
2.
FLASHCARD QUESTION
Front
What is cosmic microwave background radiation?
Back
Cosmic microwave background radiation is the afterglow radiation from the Big Bang, filling the universe and providing evidence for the Big Bang Theory.
3.
FLASHCARD QUESTION
Front
What does redshift in light from distant galaxies indicate?
Back
Redshift indicates that galaxies are moving away from us, suggesting that the universe is expanding.
4.
FLASHCARD QUESTION
Front
What is the estimated age of the Earth?
Back
The estimated age of the Earth is about 4.5 billion years.
5.
FLASHCARD QUESTION
Front
What is the significance of the abundance of Hydrogen and Helium in the universe?
Back
The abundance of Hydrogen and Helium supports the Big Bang Theory, as these elements were formed in the first few minutes after the Big Bang.
6.
FLASHCARD QUESTION
Front
What is an independent variable in an experiment?
Back
An independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.
7.
FLASHCARD QUESTION
Front
What is a dependent variable in an experiment?
Back
A dependent variable is the factor that is measured or observed in an experiment, which is affected by changes in the independent variable.
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