Pluto's Density Is 1

question 74

Multiple Choice

Pluto's density is 1.8 g/cm³.Iron has a density of about 5 g/cm³.Rock (e.g.basalt) has a density of about 3 g/cm³.Ice and water have densities of 1.0 g/cm³.Which of the following can be deduced from those densities?

• A)Pluto has a large iron-nickel core.
• B)Pluto is about one-third water and two-thirds rocky material.
• C)Pluto is solid rock all the way through.
• D)Pluto is composed entirely of water or water ice.

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Definitions:

Outermost Layer

The external layer of an object or structure, which is the farthest from its center or core.

Pericardium

The double-walled sac containing the heart and the roots of the great vessels, providing protection and reducing friction.

Heart Valves

Structures within the heart that open and close to control the flow of blood through the heart's chambers and into the body.

Blood Flow

The continuous circulation of blood through the cardiovascular system, supplying nutrients and oxygen to the body.