Why Does the Moon Have Phases as Observed from Earth

question 165

Multiple Choice

Why does the Moon have phases as observed from Earth?

• A) The illuminated half of the Moon becomes more or less visible from Earth as the Moon orbits Earth.
• B) The Moon's distance from Earth changes as it moves in its elliptical orbit, thereby changing its apparent brightness.
• C) Earth's shadow gradually moves over the Moon's surface as the Moon orbits Earth.
• D) The Moon's rotation brings more or less of the illuminated hemisphere into view from Earth.

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Definitions:

Productive Resources

Inputs used in the production of goods and services, such as land, labor, capital, and entrepreneurship.

Productive Resources

are inputs used in the production of goods and services, such as land, labor, and capital, that contribute to productivity and economic output.

Living Standards

The level of wealth, comfort, material goods, and necessities available to a certain socioeconomic class in a certain geographic area.

Birthrates

The number of live births per thousand of population per year, a primary indicator of population growth.