Why Does the Surface Area of Earth Remain Constant Throughout

question 22

Multiple Choice

Why does the surface area of Earth remain constant throughout time?

• A) Subduction occurs.
• B) Rates of sea-floor spreading are equal to sea-floor consumption.
• C) Plates slip past each other.
• D) Both a and b are correct.
• E) Both b and c are correct.

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Definitions:

Imports

Goods or services brought into one country from another for sale or use.

Opportunity Cost

The cost of forgoing the next best alternative when making a decision or choosing between options.

Comparative Advantage

The ability of an individual, firm, or country to produce a certain good or service at a lower opportunity cost than others.

Trade Deficit

The economic condition that arises when a country imports more goods and services than it exports.