How Is Coal Produced

question 11

Multiple Choice

How is coal produced?

• A) with natural gas
• B) the same way oil is produced
• C) Obsidian and water are mixed together and buried for hundreds of years.
• D) Plant organic matter is compressed into rock under elevated heat and pressure during burial.

---

Definitions:

Basic Research

A form of scientific investigation that aims to increase the understanding of fundamental principles, without immediate application to practical problems.

Self-Awareness

The conscious knowledge of one’s own character, feelings, motives, and desires.

Temporal Precedence

A condition in causal research where the cause must occur before the effect can be observed.

Covariation

The measure of how changes in one variable are associated with changes in another variable.