8.10A Convection
Flashcard
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Science
•
8th Grade
•
Practice Problem
•
Hard
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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 causes a sea breeze?
Back
A sea breeze is caused by the Sun heating the land faster than the water, leading to warmer air over the land that rises and creates a convection current.
3.
FLASHCARD QUESTION
Front
What is the primary source of energy that generates wind?
Back
The primary source of energy that generates wind is solar radiation.
4.
FLASHCARD QUESTION
Front
Why do currents exist in the ocean and air?
Back
Currents exist because the Sun heats air and water unevenly, particularly at the equator where it receives more direct sunlight.
5.
FLASHCARD QUESTION
Front
What happens to hot water in a beaker when heated?
Back
Hot water becomes less dense than cool water, causing it to rise while the cooler, denser water sinks.
6.
FLASHCARD QUESTION
Front
What is the role of density in convection?
Back
Density differences in fluids cause warmer, less dense fluid to rise and cooler, denser fluid to sink, creating convection currents.
7.
FLASHCARD QUESTION
Front
What is an example of convection in everyday life?
Back
An example of convection is a lava lamp, where the warm wax rises and the cooler wax sinks.
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