What Is an Index Fossil

question 17

Multiple Choice

What is an index fossil?

• A)a fossil found in a particular site
• B)the ideal specimen of that species that all later descriptions must refer to
• C)a marker used to determine the age of a geological layer
• D)the type specimen of a species

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Definitions:

Baillargeon

Baillargeon is a surname that may refer to researchers in various fields; in psychology, Renee Baillargeon is known for her work on infants' cognitive development, especially in understanding object permanence.

Truth Value

The attribute denoting the truthfulness or falseness of a proposition or statement.

Sixth Graders

Students who are in the sixth grade of their school education, often around the age of 11-12 years.

Formal Operations

The stage in Piaget's theory of cognitive development where individuals learn to think abstractly and reason logically.