EPS 80 Midterm 2 (Free-Response)

Lecture 2-Geological Time

Describe what the lines of evidence are that demonstrate that many elements are made in stairs, rather than all elements being present from the start of the universe. (2 Points)

Lecture 2-Geological Time

Describe very approximately, the order of things that happened after our planet formed. Bullet points are fine, as are dates within 100 million years after 500 Ma and before 500 Ma. (3 Points)

Lecture 2-Geological Time

Describe the significance of banded iron formations in the context of oxygen evolution in Earth’s atmosphere (2 Points).

Lecture 2-Geological Time

Describe the approximate timing of one max extinction, and what a possible cause of this extinction was (1 Point)