Elevated Levels of Iridium Are Found in the Geologic Layer

question 2

Multiple Choice

Elevated levels of iridium are found in the geologic layer at the K-Pg boundary. Is this unusual?

• A) Yes. Iridium is a common metal on Earth but rarely accumulates in a single layer.
• B) No. Iridium is a rare element on Earth, but geological layers of iridium are not uncommon.
• C) Yes. Iridium is a rare metal on Earth.
• D) Yes. Composition differences between geological layers tend to equilibrate over time.

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Definitions:

Liability

A financial obligation or debt owed by a business or individual to others, which requires settlement in the future.

Asset

Resources owned or controlled by a business, expected to produce future economic benefits.

Accounting Period

A specific period of time used for financial reporting, typically a quarter or year.

Trial Balance

A Trial Balance is a report that lists the balances of all general ledger accounts at a specific point in time, utilized to verify the total debits equal total credits in the accounting system.