« previous next »

Author Question: There are considerably more air molecules near Earths surface than higher up, which means, in ... (Read 47 times)

lunatika

  • Hero Member
  • *****
  • 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

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 13, 2018
Answer to Question 1

ANSWER: c

Answer to Question 2

ANSWER: b


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

Did you know?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

The Venusian Surface The Venusian Surface
Osmosis: Water moves from an area of low solute concentration to an area of higher solute ... Osmosis: Water moves from an area of low solute concentration to an area of higher solute ...
A compression gauge designed for the higher compression rate of a diesel engine should be used when ... A compression gauge designed for the higher compression rate of a diesel engine should be used when ...
The Molecules of the Innate Immune Response The Molecules of the Innate Immune Response
Knead lower leg muscles by bending the knee until the foot is flat on the supporting surface. Reach ... Knead lower leg muscles by bending the knee until the foot is flat on the supporting surface. Reach ...
Body Wave and Surface Wave Travel Body Wave and Surface Wave Travel
Video: Mutations and translation

For a complete list of videos, visit our video library