Science Adie

is the smallest unit of matter that possessesphysical and chemical properties.

particles (protons, neutrons, and electrons) that compose an atom. Protons are the positively charged particles; neutrons have no charge, while the electrons are the negatively charged particles.

consists of two or more atoms that are chemically bonded together.

highly organized assemblies of several macromolecules bonded together to perform specific function in the cell.

a collection of organelles that are functioning together. It is considered as the basic unit of life that is capable of carrying out all the functions of living things.

a group of distinct and similar cells that work together to perform a specific set of functions.

consists of different tissues organized together to perform a certain function.

a collection of different organ systems that work together to bring about various life activities.

consists of all the community of organisms (biotic components) that inhabit the samearea, as well as the nonliving (or abiotic) componentsof the area and the set of interactions that existbetween these two components.

• Population

• Community

• Ecosystem

• Biome

• Biosphere

a group of organisms of the same species occupying any given area. These organisms freely interact with one another. Populations are sometimesassociated into small groups-a pack of wolves, pride of lions, town of squirrels, herd of cattle, and colony of termites.

• Population

• Community

• Ecosystem

• Biome

• Biosphere