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118 questions
Which of the following answers is the most scientific answer for the question:
What is friction?
The random force between two solids, liquids, or gases.
The contact force between two solids, liquids, or gases that slide past one another.
The thing that creates static electricity
A force that is random
Objects will accelerate towards Earth at a rate of
-1.6 m/s2
9.8 m/s2
-9.8 N
1.6 N
Nucleus
Animal Cell
Plant Cell
In the modern day atmosphere, what is the approximate percentage of nitrogen?
0.04%
21%
78%
This is a gas produced from breathing, volcanic eruptions, and burning of fossil fuels
Water Vapor
Methane
Ozone
Carbon Dioxide
This gas is "in" the troposphere and acts like a blanket trapping heat and UV rays
Ozone
Water Vapor
Carbon Dioxide
Nitrous Oxide
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