The seventeen quizzes with a gold marble were written by the English faculty at an estimable midwestern university and are used here with the permission of that department.

The ten quizzes with a red marble were prepared by students in Professor Karyn Hollis's Tutor Training course at Villanova University.

After one half-life (4.5 billion years), what percent of the original uranium remains?

Predict how many of your 100 carbon 14 atoms are going to be left in the bucket after 5700 years The half life for Carbon-14 is 5700 years Prediction_____ Click play Hit Pause when the graph at top gets to the red line… Was your prediction accurate: YES or NO DESCRIBE WHAT HALF LIFE IS IN YOUR OWN WORDS HERE What percentage of carbon is left after 1 half life After three half-lives (13.5 billion years), what percent of the original uranium remains?

For students for whom English is a Second Language, we also highly recommend the Self-Study Quizzes for ESL Students, a project of The Internet TESL Journal.

The age of the fossil must be determined so it can be compared to other fossil species from the same time period.

- Law of Superposition, Principles of Original Horizontality & Cross-Cutting Relationships.

Percent Here Percent Here Screenshot of graph at 3 half-lives Screenshot of graph at 4 half-lives on link above and answer the questions as the animation plays.

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