is for Anthropogenic

Occurring as a result of a human influence.

is for Birth Control

Methods used to control fertility and childbirth.

is for Chromosome

Subcellular unit composed of DNA and containing the genetic information of eukaryotic organisms.

is for Demographic Transition

A pattern of falling death rates and birth rates in response to improved living conditions; could be reversed in deteriorating conditions.

is for Energy

The capacity to do work (that is, to change the physical state or motion of an object).

is for Food Web

A complex, interlocking series of individual food chains in an ecosystem.

is for Gene

A unit of heredity; a segment of DNA nucleus of the cell that contains information for the synthesis of a specific protein, such as an enzyme.

is for Habitat

The place or set of environmental conditions in which a particular organism lives.

is for Infiltration

The process of water percolation into the soil and pores and hollows of permeable rocks.

is for Jet Streams

Powerful winds or currents of air that circulate in shifting flows; similar to oceanic currents in extent and effect on climate.

is for Kinetic Energy

Energy contained in moving objects such as a rock rolling down a hill, the wind blowing through the trees, or water flowing over a dam.

is for Life Span

The longest period of life reached by a type of organism.

is for Mesosphere

The atmospheric layer above the stratosphere and below the thermosphere; the middle layer; temperatures are usually very low.

is for Nonrenewable Resources

Minerals, fossil fuels, and other materials present in essentially fixed amounts (within human time scales) in our environment.

is for Open Range

Unfenced, natural grazing lands; includes woodland as well as grassland.

is for Pathogen

An organism that produces disease in a host organism, disease being an alteration of one or more metabolic functions in response to the presence of the organism.