For Water to Have Been Stable on Mars in the Past

question 5

Multiple Choice

For water to have been stable on Mars in the past,

• A) temperature must have been higher and the atmospheric pressure lower
• B) temperature must have been lower and the atmospheric pressure higher
• C) both the temperature and the atmospheric pressure must have been higher
• D) both the temperature and the atmospheric pressure must have been lower

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Definitions:

Total Revenue

The entire amount of income generated by the sale of goods or services by a company before any expenses are deducted.

Fixed Costs

Costs that do not vary with the level of production or sales, such as rent, salaries, and insurance premiums.

Variable Costs

Costs that change in proportion to the level of goods or services that a business produces.

Profit

The financial gain realized when the amount of revenue gained from a business activity exceeds the expenses, costs, and taxes involved in sustaining the activity.