What Is the Main Control on Whether a Planet or Moon

question 42

Multiple Choice

What is the main control on whether a planet or moon has active tectonics and volcanism?

• A) whether it is composed of rocks or ice
• B) whether it contains water on its surface
• C) the size of an object
• D) the distance that the object is from the Sun

---

Definitions:

Marginal Revenue

The additional income that is generated by selling one more unit of a good or service.

Marginal Revenue

Marginal Revenue refers to the extra revenue that is earned by selling an additional unit of a product or service.

Marginal Cost

The hike in total expenditure linked to the production of one additional good or service unit.

Monopolistically Competitive

Describes a market structure where many firms sell products or services that are similar but not perfect substitutes, leading to competitive pricing and differentiation.