As the puck falls, the amount of potential energy it has decreases. Why? a. It is lost to the air friction
b. It is released as sound energy
c. It is changed into kinetic energy
d. It is stored in the puck

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