What Evidence Suggests That Enceladus Has Ongoing Geological Activity

question 88

Multiple Choice

What evidence suggests that Enceladus has ongoing geological activity?

• A)Voyager 2 photographed liquid nitrogen geysers 10 kilometers tall.
• B)Lack of impact craters on much of its surface, evidence of ice flows from possible volcanicactivity, and geysers that supply material for the E-ring.
• C)Voyager 1 showed sulfur eruptions all over its pizza-pie colored surface.
• D)Enceladus is located within Saturn's Roche limit, and ready to blow up.
• E)Enceladus undergoes severe tidal stresses from its resonance with Titan.

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Definitions:

High-low Method

A technique used in cost accounting to estimate variable and fixed costs based on the highest and lowest levels of activity.

Machine Hours

A measure of the amount of time a machine is operated, used in accounting to allocate manufacturing overhead costs.

Cost Driver

A factor that causes a change in the cost of an activity, essentially determining the level of expense incurred in producing a product or service.

Least Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of the squares of the differences between observed and predicted values.