What Is Thought to Be the Physical Mechanism That Was

question 62

Multiple Choice

What is thought to be the physical mechanism that was responsible for the present mix of chemical elements in the universe?

• A) All the known elements have been formed by the breakup (radioactivity) of the heavy elements formed in the initial Big Bang.
• B) All the known elements were formed in the Big Bang.
• C) Hydrogen and helium were formed in the Big Bang, whereas the heavier elements have been slowly forming by collisions in cold interstellar gas clouds.
• D) Hydrogen and helium were formed in the Big Bang, whereas the heavier elements were made in the centers of stars.

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Definitions:

Testosterone

A steroid hormone that plays a key role in the development of male reproductive tissues, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.

Estrogen

A group of steroid hormones that play a crucial role in the development and regulation of female reproductive and sexual functions.

Pumé People

An indigenous group of people who live in the savannah regions of southwestern Venezuela, known for their semi-nomadic lifestyle and fishing-based economy.

Middle Childhood

A developmental stage that typically encompasses the ages 6 to 12 years, marked by significant growth in cognitive, social, and emotional areas.