Earth Is Much Larger Than the Moon, Yet It Has

question 131

Multiple Choice

Earth is much larger than the Moon, yet it has far fewer craters. Which statement is NOT an explanation for the disparity in crater numbers?

• A) Earth's atmosphere caused many smaller impactors to burn up before striking the surface.
• B) Some older craters on Earth were worn away by the action of wind and rain.
• C) Some older craters on Earth were eradicated as parts of the crust are constantly subducted.
• D) Earth's larger gravity tends to focus the orbits of near misses so that they hit the Moon instead.

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Definitions:

Filtration Membrane

A semipermeable barrier that separates particles in a fluid, commonly found in the kidneys for waste removal from the blood.

Bowman Capsule

The Bowman capsule is a cup-like sack at the beginning of the tubular component of a nephron in the kidney, enclosing the glomerulus and involved in filtration.

Countercurrent Mechanism

A process by which fluids flow in opposite directions in adjacent tubes, exchanging properties (such as heat or concentration) to facilitate efficient transfer.

Uric Acid

A waste product formed from the breakdown of purines, excreted in urine.