Each Choice Below Describes How a Few Astronomical Phenomena Are

question 2

Multiple Choice

Each choice below describes how a few astronomical phenomena are related to time periods.Which list is entirely correct? (Careful: some lists are partially correct. )

• A)Earth's rotation defines a day. The cycle of the Moon's phases takes about a month.
• Earth's orbit defines a year.
• Earth's cycle of axis precession takes 26,000 years.
• B)Earth's rotation defines a day. The cycle of the Moon's phases takes about a week.
• Earth's orbit defines a year.
• Earth's cycle of axis precession defines a month.
• C)Earth's rotation defines a day. The Sun's rotation defines a week.
• The Moon's rotation defines a month.
• Earth's orbit defines a year.
• D)Earth's rotation defines a day. The saros cycle of eclipses defines a month.
• Earth's orbit defines a year.
• Earth's cycle of axis precession takes 26,000 years.

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Definitions:

Absolute Advantage

The ability of an entity to produce more of a good or service than competitors using the same amount of resources.

Opportunity Cost

The cost of foregone alternatives when a choice is made, represented by the benefits that could have been received by choosing the next best alternative.

Soybeans

Refers to a type of legume native to East Asia, widely grown for its edible bean which has numerous uses.

Comparative Advantage

The ability of a country or individual to produce a particular good or service at a lower opportunity cost than others.