The Universe
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is convection?
Back
Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.
2.
FLASHCARD QUESTION
Front
What are absolute magnitude and apparent magnitude?
Back
Absolute magnitude is the actual brightness of a star, while apparent magnitude is how bright a star appears from Earth.
3.
FLASHCARD QUESTION
Front
What are the two most common elements in main sequence stars?
Back
Hydrogen and helium are the two most common elements that make up main sequence stars.
4.
FLASHCARD QUESTION
Front
Which type of star is brighter but cooler?
Back
A red hypergiant star is brighter but cooler compared to other types of stars.
5.
FLASHCARD QUESTION
Front
What determines the strength of gravity between two objects?
Back
Gravity is determined by the mass of the objects and the distance between them.
6.
FLASHCARD QUESTION
Front
What is the difference between conduction and convection?
Back
Conduction is the transfer of heat through direct contact, while convection involves the movement of fluids.
7.
FLASHCARD QUESTION
Front
What is a blue giant star?
Back
A blue giant star is a very hot and luminous star that is much larger than the Sun.
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