Based on the Age of the Light- and Dark-Colored Regions

question 29

Multiple Choice

Based on the age of the light- and dark-colored regions of the Moon and the number of craters observed in these regions,we know that impacts in the inner Solar System

• A) rapidly decreased approximately 3 billion years ago.
• B) rapidly decreased approximately 1 billion years ago.
• C) were very rare in the last 4.5 billion years.
• D) occurred at approximately a constant rate throughout most of the age of the Solar System.

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Definitions:

Mutually Exclusive

Situations, events, or decisions that cannot occur or be undertaken simultaneously—if one happens, the other cannot.

Projects

Initiatives or plans undertaken to achieve specific objectives, which can be either short-term or long-term in nature.

Payback Period

The time required for the return on an investment to "pay back" the sum of the original investment, often used for capital budgeting.

Investment

Disbursing assets, particularly money, with the objective of obtaining income or profit.