Old atoms never die. Atoms that may have once belonged to a dinosaur may now be in your blood and tissues. This set shows students how the microscopic world helps to keep the world ecosystem in balance as it follows the on-going cycle of producers, consumers and decomposers. 1. Algae – Diatom (200x) / Pediastrum (200X) 2. Protozoa – Blepharisma (200x) / Suctorian (200X) 3. Starfish embryos (200X) 4. Arthropods – Cyclops (10X) 5. Nematodes (40X) 6. Virus on E. coli (60,000X) 7. Fungi – Penicillium (200X) 8. Bacteria – Spirillum (400X)