Floating through space…what makes a planet “alive”….why do some of the things in space look “dead”? Sun (stars) shines on many of these “dead” things.
Absolute-Dating Methods-4 types
The discovery of radioactivity –destroyed Kelvin’s argument for the age of Earth –and provided a clock to measure Earth’s age A. Radioactivity is the spontaneous.
Chapter 3 What the rocks say: how geology and paleontology reveal the history of life
