Why Should an Observer Expect to See No Craters, Such

question 10

Multiple Choice

Why should an observer expect to see no craters, such as those on the Moon or Mars, on Io, the innermost Galilean moon of Jupiter?

• A) The continuous water rainfall quickly erodes and washes away any trace of craters.
• B) Volcanoes are continuously depositing new material onto the surface.
• C) The liquid surface cannot maintain a crater, just as Earth's oceans cannot.
• D) The surface is always reentering the planet's interior by subduction in rapid plate tectonic motion, similar to but faster than that on Earth.

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Definitions:

Rational Expression

An expression formed by the ratio of two polynomials, essentially a fraction wherein both the numerator and the denominator are polynomials.

Rational Expression

An expression that can be written as a fraction where both the numerator and the denominator are polynomials.

Rational Function

A rational function is a ratio of two polynomials, where the denominator polynomial is not zero, used to describe relations that involve rates of change.

Undefined

A term used to describe an expression or result that does not have a meaningful value under given conditions, such as division by zero.