How Do We Know That Mercury Contains a Higher Percentage

question 36

Multiple Choice

How do we know that Mercury contains a higher percentage of iron than does the Earth?

• A)The reddish color of its surface rocks indicates iron oxides
• B)Its surface is very smooth and shiny
• C)There are traces of gaseous iron in its atmosphere
• D)Although it is smaller than Earth,its density is about the same

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Definitions:

Agnosia

A neurologic condition characterized by the inability to recognize and identify objects or persons, despite having intact sensory functions.

Carbon-monoxide Poisoning

A toxic condition that occurs from inhaling carbon monoxide gas, which can prevent the blood from carrying oxygen to cells, tissues, and organs.

Centre-surround

A principle often used in neurophysiology and vision science, describing how certain neurons in the visual system have receptive fields with a center region that responds one way (e.g., to light) and a surround region that responds in the opposite way.

Receptive Field

The specific physical area within the sensory space (such as visual or auditory) that can elicit a response from a sensory neuron when stimulated.