3. Warmup How is an airplane flight simulator a kind of model?
What are some advantages to training pilots in a flight simulator rather than in a real airplane?

4. Objectives:
Explain how models are used to represent the natural world.
Identify three types of scientific models.
Describe theories and laws.

5. Types of Models Model A representation of an object or a system.
Physical Models
look like the thing they represent
For example, the model volcano looks like a real one but won’t destroy acres of forests.

6. Mathematical Models Conceptual Models
Made up of mathematical equations and data.
Conceptual Models
Systems of ideas or are based on making comparisons with familiar things to explain an idea.
Explains the origin of the universe

7. Models are just the right size
Often used to represent things that are very small or very large.
Useful for studying cells and particles of matter that are too small to see with the unaided eye.
Also useful for studying objects that are too large to see completely
such as the Earth or the solar system.

8. Video
husudas5vs4
2 videos

9. Models build scientific knowledge
Often used to help illustrate and explain scientific theories.
Theory
Explanation that ties a broad range of hypotheses and observations that have been supported by testing.
Can also be used to predict what will happen in future
Theories and models can change as new observations are made.
Charles Darwin’s Theory of Evolution
1897 Model of Atom
Current Model of Atom

10. Scientific Laws Law is defined as:
Formed when a theory and its models correctly predict the results of many different experiments.
Law is defined as:
A summary of many experimental results and observations.
Laws are not the same as theories. Laws tell you only what happens, not why it happens.
Difference between a theory and Law (5 min)