What Behaviour of Galactic Rotation Curves Suggests the Existence of Dark

question 37

Multiple Choice

What behaviour of galactic rotation curves suggests the existence of dark matter in an extended halo?

• A)Small velocities are seen at large distances from the galactic centre.
• B)Small velocities are seen at distances close to the galactic centre.
• C)Large velocities are seen at large distances from the galactic centre.
• D)Large velocities are seen at distances close to the galactic centre.

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Definitions:

Solvent

A substance, typically a liquid, capable of dissolving other substances (solutes) to form a solution.

Solute

A material that is dissolved within another material, usually forming the smaller proportion of a solution.

Solution

A homogeneous mixture composed of two or more substances, where the solute is dissolved in the solvent.

Table Salt

A white crystalline substance that gives seawater its characteristic taste and is used for seasoning or preserving food, chemically known as sodium chloride (NaCl).