Why Do We Know That at Least One Generation of Stars

question 16

Multiple Choice

Why do we know that at least one generation of stars formed and died before the Milky Way's globular clusters formed?

• A) All globular cluster stars have some amount of heavy elements.
• B) They are so old that nuclear fusion in globular cluster stars has altered their chemical abundances.
• C) Globular clusters are 9 to 10 billion years old.
• D) No globular cluster is older than 12 billion years.
• E) All globular clusters reside in the disk of the Milky Way.

---

Definitions:

Sufficient Evidence

Adequate information or proof required to support a claim or conclusion.

Good Argument

An argument that is logically sound, with premises that are true and relevant, leading to a conclusion that follows logically.

Good Listening Skills

The ability to actively understand information provided by the speaker, showing interest, and providing feedback.

Arguments

A series of statements or reasons made to persuade others that an action or idea is right or wrong.