2. Living vs. Non-Living vs. Once Living What can living things do?

3. In your group... Come up with a list of characteristics that you think all living things share Give 5 examples of living things that fit your criteria Be ready to share your findings with the class

4. Characteristics of Living Things Not all scientists agree on a single list of characteristics, the list we are going to use is as follows: –Made of cells –Metabolism –Respond to environment –Grow –Reproduce

5. Organism An individual living thing that can react to stimuli, reproduce, grow, and maintain homeostasis. It can be a bacterium, protest, fungus, plant or animal.

6. 1. Cells All living things are made of biological cells Cells are the smallest unit of living things

7. 2. Metabolism Addition and removal of products. AKA the transfer of energy We take energy in, and we use that energy

8. Metabolism (cont.) Addition of Energy All living things need energy, organisms obtain energy in one of three ways –E–Eating food –P–Photosynthesis (when plants make their own food) –D–Decomposing of other organisms

9. Respiration (Breathing) Using Energy The use of OXYGEN to burn food to make energy (metabolism). O2O2 + = ENERGY

10. Excretion of Waste Removal of Products Removal of waste products no longer needed in the body

11. 3. Respond to Environment A reaction to a stimulus; ability to keep a stable internal environment Maintaining a balance inside the body is called homeostasis

12. 4. Growth Increase of size Development, reconstruction of body structure –What is an example of an organism that completely reconstructs it’s body during it’s lifetime?

14. 5. Reproduce To make more of self.

15. One more... Movement NOT AN ACTUAL CHARACTERISTIC OF LIFE To change location; can also be internal movement Sometimes classified under response to stimuli

16. Plants move too! http://www.youtube.com/watch?v=k_rLb5v 5nIMhttp://www.youtube.com/watch?v=k_rLb5v 5nIM

17. Once Living Something is classified as once living if at one time it did have all the characteristics of life, but does not now –Examples? Fossils, Dead Organisms, Oil etc.

18. Non-Living Things Have no characteristics of life and have never had any of the characteristics of life –Examples? Rocks, Dirt, Metal, Stapler etc.

19. Is it alive? Dog Pencil Oak Tree Daisy Bacteria Coal Fossil Sponges Rock Dirt Paper Air Guinea Pig Car