Mercury Experiences Extreme High and Low Temperatures Between Night and Day

question 49

Multiple Choice

Mercury experiences extreme high and low temperatures between night and day because:

• A)it is so close to the Sun.
• B)its dense atmosphere creates a runaway greenhouse.
• C)its oceans are much hotter than ours.
• D)Mercury has no axial tilt, with its equator always exposed to direct sunlight.
• E)it has no true atmosphere to moderate temperatures over the globe.

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Definitions:

Cardiac Cycle

is the sequence of events that occurs in the heart from one heartbeat to the next, including contraction (systole) and relaxation (diastole) phases.

AV Node

A part of the heart's electrical system which acts as a gateway between the atria and ventricles, ensuring the timing of heartbeats.

Electrical Impulse

A sudden surge of energy in one direction, often used in the context of neurons firing and the transmission of signals through the nervous system.

Muscle Contraction

The process of generating tension within a muscle fiber through the actin and myosin filaments sliding past each other.