Dust in Galaxies Does Not Count as Dark Matter Because

question 86

Multiple Choice

Dust in galaxies does not count as dark matter because

• A) it absorbs only some wavelengths of light but not all wavelengths as dark matter does.
• B) it interacts with light.
• C) it is found only in spiral disks, whereas dark matter is also found in elliptical galaxies.
• D) dust is easily destroyed by dark matter.
• E) there is never enough to account for all the gravity in galaxies.

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Definitions:

Thyroid Gland

An endocrine gland located in the neck, producing hormones that regulate metabolism, energy generation, and overall growth and development.

Parathyroid

Small glands located behind the thyroid which produce parathyroid hormone, involved in calcium regulation.

Vertebra Prominens

The most prominent vertebra in the neck, easily felt through the skin, typically the seventh cervical vertebra (C7).

C7 Vertebra

The seventh cervical vertebra, located near the base of the neck, distinguished by its prominent spinous process.