1. Unit 2: To Good Health! (Cells & Systems)

2. Diversity of Life
~2 million known different types of living things on Earth
Similarities?
Differences?

3. Topic 1: Characteristics of Living Things

4. Biotic vs. Abiotic
Sort the items in the envelope into 3 different groups:
Biotic (living)
Abiotic (non-living) ?

5. Characteristics of Living Organisms
1. Require Energy
Energy = ability to create, move or change
Different organisms obtain energy in different ways
Producers make their own energy
Photosynthesis
Consumers eat to obtain energy

6. 2. Respond to the Environment
Living organisms react to a stimulus or trigger

7. 3. Grow & Develop
Get bigger
Change in structure

8. 4. Reproduce
All living things come from other living things

9. 5. Have adaptations
Structure or behavior that allows an organism to survive & reproduce in its environment

10. 6. Exchange gases
Gases taken in and given off
Oxygen ↔ Carbon dioxide

11. 7. Made of cells
Cell is the building block of life
Cell can perform all of the processes that life depends on
Taking in food
Creating energy
Exchanging gases
Getting rid of wastes
Reproducing
Are microscopic in size
Cells CAN be found in material that was once living
Eg. wood from a tree
NOT found in non-living items

12. Structure & Function Function Structure Dolphin Tree Beetle Tiger
1. Gathering food 2. 3. 4.

13. Look at the organisms and decide what structure each organism uses to perform each function
Did all organisms have structures for the functions listed?
For each function, how are the structures similar? How are the structures different?

14. Structures can be extremely different between organisms and still accomplish the same function