Organization of Life
Atom Smallest unit of matter
Molecule Made of 2 or more atoms
Cell The smallest unit of life
Tissue Made of many cells
Organ Made of many tissues working together to do the same job
Organ System Made of several organs working together to do a job
Multi- cellular Organism Made of several cells
Population A group of the same organisms living together in a particular environment
Community Several populations living together in a particular environment
Ecosystem Several communities living together in a particular environment
Biosphere All of the worlds ecosystems