1. Living Things

2. Organism A living thing.
Plants, animals, fungus, bacteria, (virus), plankton, etc…

3. 6 Characteristics of ALL Living Things:
Made of Cells.
Contain similar chemicals.
Uses energy.
Grows & develops.
Responds to its surroundings.
Can reproduce.

4. 1) Made of Cells
Cell: Basic unit of structure and function in an organism.

5. Structure of a cell Function of a cell The way it is made
The job it performs in the organism.

6. Unicellular
An organism that is made up of only one cell that does everything.
Ex: Bacteria

7. Multi-cellular
An organism that is made up of many cells. Each cell has a specific job to do.
Ex: human body

8. 2) Contain similar chemicals
Cells are made of chemicals.
Most abundant: Water
Basic Chemicals in a Life Form: C = Carbon
H = Hydrogen
O = Oxygen

9. 3) Uses energy
Cells use energy to grow, make repairs, reproduce, digest food, etc…

10. 4) Grow and Develop Growth: process of becoming larger
Development: process of change that occurs during an organism’s life.

11. 5) Responds to its surroundings
Organisms react to what is going on around them.
Stimulus: Change in surroundings.
Response: How an organism reacts to change – an action or change in behavior.

12. External Stimulus: Changes from outside the organism
External Stimulus: Changes from outside the organism. (light, sound, temperature)
Internal Stimulus: Changes from inside the organism. (hunger, thirst)

13. 6) Reproduction
The ability to produce offspring that are similar to the parents.
Ex: Birds lay eggs which hatch baby birds that look like their parents.
Oak trees have acorns which are planted and grow into new trees.
Bacteria produce other bacteria exactly like themselves.

14. (under Reproduction Notes)
Two main types of reproduction:
Asexual & Sexual

15. Asexual Reproduction
The reproductive process that involves only one parent and produces offspring that are identical to the parent

16. Sexual Reproduction
The reproductive process that involves two parents whose genetic material is combined to produce a new organism, which differs from both parents