One of the Strongest Lines of Evidence of a Meteor

question 12

Multiple Choice

One of the strongest lines of evidence of a meteor or comet impact in the late Cretaceous is

• A)a thin layer of potassium- 40 in late Cretaceous fossil strata.
• B)a thin layer of iridium- enriched clay in late Cretaceous fossil strata.
• C)the extinction of the dinosaurs.
• D)the warming of Earth's climate in the late Cretaceous.

---

Definitions:

Confidence Interval

A range of values derived from sample data that is believed to contain the true population parameter with a certain level of confidence.

P-value

A statistical measure that helps in determining the significance of the results from a test, indicating the probability of observing results at least as extreme as those seen, under the assumption that the null hypothesis is true.

Chi-square Distribution

The Chi-square distribution is a probability distribution used in statistical significance tests, particularly suitable for categorical data.

Normal Distribution

A bell-shaped distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.