Which of These Statements Correctly Describes Cosmologists' Current State of Knowledge

question 14

Multiple Choice

Which of these statements correctly describes cosmologists' current state of knowledge about the future expansion of the universe?

• A) The amount of matter (both visible and dark) is only 1/3 the amount needed to halt expansion, so the expansion will continue to slow down but will never stop.
• B) The amount of matter (both visible and dark) is only 1/3 the amount needed to halt expansion, and there is strong evidence of a previously unknown form of energy that acts to accelerate the expansion.
• C) The amount of matter (both visible and dark) is exactly the right amount needed to halt expansion after an infinite amount of time has gone by.
• D) The amount of matter (both visible and dark) is 3 times the amount needed to halt expansion, so the expansion will eventually stop and the universe will begin to collapse.

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Definitions:

Stable Environment

An environment where conditions remain relatively constant over time, allowing for the maintenance of ecosystem equilibrium.

Epithelial Tissues

Layers of cells that cover the body's surfaces, line cavities, and form glands, playing key roles in protection, secretion, and absorption.

Sweating

The process of secreting fluid from the body's sweat glands, primarily for cooling the body through evaporation.

Panting

Rapid shallow breathing through the mouth, often used as a means of reducing body temperature by animals, including humans.