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Author Question: There are considerably more air molecules near Earths surface than higher up, which means, in ... (Read 97 times)

lunatika

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  • Posts: 548
on: Jul 13, 2018
There are considerably more air molecules near Earths surface than higher up, which means, in comparison, air near the surface
   a. is less dense.
   b. has the same density.
   c. is more dense.
   d. has no density.
   e. is only half as dense.

Question 2

Most human-made impurities found in the atmosphere present a health and environmental hazard. These are called
   a. nutrients.
   b. pollutants.
   c. aerosols.
   d. dust.
   e. particles.


komodo7

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Reply #1 on: Jul 13, 2018
Answer to Question 1

ANSWER: c

Answer to Question 2

ANSWER: b


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