Given That the Total Number of Atoms on Our Planet

question 49

Multiple Choice

Given that the total number of atoms on our planet remains fairly constant,how is it ever possible to deplete a natural resource such as a metal?

• A)The problem remains that not everyone recycles as they should.
• B)Recycling only forestalls the inevitable depletion of metal resources.
• C)The atoms don't leave our planet,which is why naturally occurring materials never really reach the point of depletion.
• D)The problem is with the expense of collecting metal atoms that are uniformly dispersed.

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Definitions:

Inflammatory Bowel Disease

A term for two conditions, Crohn's disease and ulcerative colitis, that cause chronic inflammation of the gastrointestinal tract.

Corticosteroids

A class of steroid hormones that are produced in the adrenal cortex and used medicinally to reduce inflammation and suppress the immune system.

Histamine-Receptor Antagonist

A substance or drug that blocks the action of histamine, reducing or preventing the typical symptoms associated with allergies.

GER

Gastroesophageal Reflux, a condition in which stomach acid flows back into the esophagus, causing discomfort.