A lesson in which students analyze the chemical data that led researchers to conclude that the K-T boundary layer contained an extraordinary concentration of iridium.
A worksheet in which students calculate how much iridium was released, and eventually deposited all over the Earth, by the impact of the asteroid that caused the K-T extinction.
To accompany the lecture series Scanning Life's Matrix: Genes, Proteins, and Small Molecules.
This activity guides students through building a conceptual model of how carbon dioxide affects Earth's climate
An activity that recreates zones of microbial activity in a glass column. To accompany the lecture series Changing Planet: Past, Present, Future.