1.
atom: the smallest part of an element that can still keep the characteristics of that element
2.
biome: a regional type of ecosystem that has a distinctive climate with organisms adapted to that area
3.
biosphere: the region of air, water and land around earth where life exists
4.
cell: the smallest unit that can live and reporduce either independently, or with many other cells
5.
community: populations of species living and interacting together in an area; the living (biotic) part of an ecosystem
6.
Earth: third planet from the Sun; commonly divided into three major parts, solid earth, hydrosphere (water), and atmosphere
7.
ecosystem: a biological community interacting with its nonliving/physical (abiotic) enviorment
8.
electron: a negatively charged subatomic particle found outside the nucleus of all atoms
9.
molecule: a unit in which two or more atoms are bonded together
10.
neutron: an electrically neutral subatomic particle found in the nucleus of most atoms
11.
organ: a group of tissues working together to do a special function or job
12.
organelle: a membrane-bound area within a eukaryotic cell that has a special function or job
13.
organism: one member of a species. Can be single-celled or multicellular
14.
population: a group of individual of the same species, living in the same area, who interbreed
15.
proton: a postively charged subatomic particle found within the nucleus of all atoms
16.
species: a group of similar organisms that can sexually reproduce and have fertile offspring
17.
system: a set of parts that work together as a whole, e.g, parts of an organism, a river, the Earth, etc
18.
tissue: a group of cells working together to do a special function or job
