Which of These Statements Is a Correct Description of the Expansion

question 20

Multiple Choice

Which of these statements is a correct description of the expansion of the universe?

• A) Spacetime is something real, with galaxies inside it; as spacetime expands, the galaxies (or superclusters of galaxies) are carried along by the expansion.
• B) Space is a vacuum, but the vacuum has real properties; as galaxies (or superclusters of galaxies) hurtle outward, the expansion is gradually slowing down by the resistance of space to the passage of the galaxies.
• C) Spacetime is static, but dark matter, which is concentrated in the outer part of the universe, pulls outward on the galaxies.
• D) Space is a vacuum, which is really nothing at all; the galaxies (or superclusters of galaxies) are hurtling outward through this nothingness.

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Definitions:

Middle Childhood

A developmental stage that typically covers the period from 6 to 12 years of age, characterized by growth in logical thinking and independence.

Adolescence

The transitional stage of physical and psychological development that occurs between childhood and adulthood, starting from puberty to legal adulthood.

Adulthood

The period in human life after adolescence, characterized by mature age, typically involving greater responsibility and independence.

Individualized Teaching

An educational approach that tailors instruction to accommodate individual students' learning needs, abilities, interests, and pace.