2nd 9 weeks review
Flashcard
•
Science
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the principle of superposition in geology?
Back
The principle of superposition states that in an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom and the youngest layers are at the top.
2.
FLASHCARD QUESTION
Front
What does the Hertzsprung-Russell diagram represent?
Back
The Hertzsprung-Russell diagram graphs stars' luminosity against their temperature, helping to classify stars and understand their evolution.
3.
FLASHCARD QUESTION
Front
What is a convergent boundary?
Back
A convergent boundary is where two tectonic plates move toward each other, often resulting in earthquakes and volcanic activity.
4.
FLASHCARD QUESTION
Front
What is a transform boundary?
Back
A transform boundary is where two tectonic plates slide past each other horizontally, which can cause earthquakes.
5.
FLASHCARD QUESTION
Front
What spectral class does our sun belong to?
Back
The sun belongs to the G spectral class, which indicates its temperature and color.
6.
FLASHCARD QUESTION
Front
What is the significance of rock layer order in geology?
Back
The order of rock layers helps geologists determine the relative ages of the rocks and the history of the Earth's surface.
7.
FLASHCARD QUESTION
Front
What is the definition of luminosity in astronomy?
Back
Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.
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