During the formation of Earth's atmosphere, one of the early atmospheres contained large amounts of water vapor and carbon dioxide. What was the Earth like as a result of this atmosphere? * helium and hydrogen gases escaped earth's gravity.
*ultraviolet light split water vapor into hydrogen and oxygen.
*Heat energy was retained and water vapor condensed.
*Increased oxygen allowed reptiles to thrive.

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth