When Researchers Observe a Correlation Between Two Variables,such as Between

question 40

Multiple Choice

When researchers observe a correlation between two variables,such as between the amount of time spent studying and test scores,they know that

• A) the first variable causes the second variable.
• B) the second variable causes the first variable.
• C) both (A) and (B)
• D) neither (A) nor (B)

---

Definitions:

Paleozoic

An era in the geologic time scale, approximately 541 to 252 million years ago, marked by the early development of life, including the Cambrian explosion.

Geologic Timescale

A system of chronological measurement that relates stratigraphy to time, used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships between events that have occurred during Earth's history.

Precambrian Era

The Precambrian Era encompasses all of geological time prior to the Cambrian Period, covering approximately 88% of Earth's history and marked by the formation of the Earth and the appearance of early life.

Oldest Rocks

The earliest-formed rocks on Earth or within a specific geological setting, often found in the deepest layers of the Earth's crust.