1. Levels of Organization

2. ATOMS
Smallest part of matter
NON-living

3. Molecules
2 or more bonded atoms
Form compounds
NON-living

4. Macromolecule Very large molecules
Proteins, fats, carbohydrates, nucleic acids
NON-living

5. Organelles
“Tiny organs”
Made of macromolecules

6. Cell
Made of organelles
Basic unit of structure & function
LIVING

7. Tissue
The same kind cell working together
Living

8. Organs
Tissues that work together
Living

9. Systems
Organs that work together
Living

10. Organism Entire living things (organisms) Usually made of systems
May be a single cell
Living

11. Population
Same type of organism living together

12. Community
Several populations living together
Population interact

13. Ecosystem
A biotic (living) community plus the abiotic (nonliving) features

14. Biome
Similar ecosystems on earth together

15. Biosphere Whole living layer around the globe
Includes abiotic features

16. On worksheet, put words in order from the smallest to largest.

17. Cell Tissue Organ Organ System Organism Atom Molecule Macromolecule
Organelle
Cell
Tissue
Organ
Organ System
Organism
Population
Community
Ecosystem
Biome
Biosphere

18. Organization in Multi-cellular Organisms
Cell – the smallest functional unit of life
Tissue – a group of similar cells that perform a particular function
Organ – many groups of tissues that work together
Organ System – groups of organs that work together to perform a specific function
Organism – consists of several organ systems that function together

19. Work on “I’m Bigger Than You” worksheet.