1. Bell Ringer
Explain why you believe scientists have to sometimes use models when conducting an experiment.

2. Scientific Models (Page 22)
Essential Question: How do models help to develop scientific knowledge?

3. Scientific Models
Model A Model B
Model C

5. Scientific Models
Model – A visual representation of an object, idea, process, or system
*Used to understand things too big or too small to observe directly

6. Scientific Models
*2 dimensional (2D) – a drawing
The Water Cycle

7. *2 dimensional (2D) – a drawing

8. Scientific Models
*3 dimensional (3D) – a physical replica of the object
*Can see all around it
*Can touch it
*Can alter it

9. *3 dimensional (3D)

10. *3 dimensional (3D)

11. Scientific Models
*Computer simulation – animation showing what is how something works or will work

12. Part 2 - Limitations of Models
*Not made to actual scale

13. Limitations of Scientific Models
*Can’t provide every single detail

14. **What are some advantages to the model of the Roller Coaster?
**What are some limitations with this model?

15.
Conclusion
Quick Write - Explain how models help to develop scientific knowledge and understanding. Give an example to support your reason.