materials taken from the natural
environment, such as water, air, and
plant life
a branch of study or knowledge
about the physical and material world
which is conducted through investigation
and observation
long-term maintenance of
ecosystem components that allows them
to continue through future generations
the study of ways in which people
and animals interact with their
environment
the external conditions, including
naturall surroundings, people, attitudes,
and anything that influences the life and
activities of people, plants, and animals
educated guess based on