How Much Did the World's Population Increase During the Twentieth

question 65

Multiple Choice

How much did the world's population increase during the twentieth century?

• A)Not at all-it stayed about the same.
• B)It doubled.
• C)It tripled.
• D)It quadrupled.

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Definitions:

Co

Co is the chemical symbol for cobalt, a naturally occurring element with atomic number 27, known for its magnetic properties and use in alloys.

Electrons

Negatively charged subatomic particles that orbit the nucleus of an atom and are involved in chemical bonds and electricity.

Atoms

The basic unit of a chemical element, consisting of a nucleus surrounded by electrons, defining the properties of matter.

U

U is the chemical symbol for uranium, a heavy metallic element used as a fuel in nuclear reactors and in the production of nuclear weapons.