Five features of emerging adults. As Arnett describes it, emerging adulthood can be defined as an: Age of identity exploration. Young people are deciding who they are and what they want out of work, school and love. Age of instability.
Definition of biohazard. : a biological agent or condition that is a hazard to humans or the environment; also : a hazard posed by such an agent or condition.
A biogeochemical cycle is defined as the movement of elements, like those above, through organisms and the environment. A way to remember this is to break apart the word biogeochemical into pieces. The first part of the word, bio, involves biological organisms, like bacteria, plants and animals.