Because We Know That the Half-Lives of Many Radioactive Isotopes

question 69

Multiple Choice

Because we know that the half-lives of many radioactive isotopes are millions of years, we can deduce that

• A) the longer it exists the more radioactive nuclei Earth produces.
• B) the sun is the source of all the radioactive nuclei on Earth.
• C) there must have been many more radioactive nuclei on Earth when life began.
• D) there must have been far fewer radioactive nuclei on Earth before life began.
• E) the natural radioactivity of minerals on the Earth was created by the Earth's internal temperature.

---

Definitions:

Preamble

An introductory statement in a document that explains the document's purpose and underlying philosophy.

First Amendment

A provision of the United States Constitution that protects freedoms concerning religion, expression, assembly, and the right to petition.

Multi-State Drug Ring

An illicit network involved in the distribution and sale of drugs that operates across multiple states.

Local Newspaper

a regionally focused publication that provides news, commentary, and features relevant to a specific city or area.