A Person Weighs Less at the Equator Than at the Poles

question 26

Multiple Choice

A person weighs less at the equator than at the poles. The main reason for this has to do with

• A) the law of action and reaction.
• B) the influence of the sun, moon, and all the planets.
• C) the spin of the Earth.
• D) the shape of the Earth.
• E) both the spin of the Earth and the shape of the Earth.

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Definitions:

Ventilation

The process of actively moving air or water over a respiratory surface.

Tracheal Tubes

Air-conducting tubes in the respiratory systems of some invertebrates, notably insects, facilitating gas exchange.

Opercula

Flap-like structures in certain animals, such as fish, that cover and protect the gills, or the lid covering the opening of a snail's shell.

Alveoli

Tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place.