Which is true of Earth's atmosphere?
A) it is the sum of all the exhalations and inhalations of animals on Earth.
B) we consider the top of the atmosphere to be about 10 km from Earth.
C) it lets light through,but blocks out all other forms of radiation.
D) its temperatures range from -90°C to 1200°C.
E) The principle substance is air,a mixture of oxygen and argon gas.
Correct Answer:
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Q6: The region of the atmosphere that is
Q7: When the Sun is active,
A)the thermopause lies
Q8: The thermosphere expands in size during periods
Q9: The highest temperatures in the atmosphere occur
Q10: Lewis Thomas,in his book The Lives of
Q12: Based on temperature,the atmosphere is divided into
A)four
Q13: The thermosphere closely corresponds to the
A)ionosphere.
B)mesosphere.
C)homosphere.
D)exosphere.
E)ozonosphere
Q14: The outermost region of the atmosphere,based on
Q15: Life is possible on Earth primarily because
A)gamma
Q16: The thermopause is located
A)between the mesosphere and
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