1. Viscosity and The Particle Theory
FLUIDS
Viscosity and The Particle Theory

2. Bill Nye Video https://www.youtube.com/watch?v=MBgM73DLK1s Handout???

3. Review What are the three states of matter?
What two states are fluids?
Why is a solid not a fluid? For example, salt can be poured.

4. Video https://www.youtube.com/watch?v=HAPc6JH85pM

5. The property that describes a liquid’s thickness or thinness.
Viscosity:
The property that describes a liquid’s thickness or thinness.

6. High viscosity: harder to pour and thicker. Slow flowing.

7. Low Viscosity--- easier to pour and runny. Flows faster.

8. Brainstorm.... What is an example of a thick liquid?
What are some examples of a thin liquid?

9. 10 Amazing Science Tricks Using Liquid!

10. Particle theory of Matter
matter consists of many small particles which are constantly moving or in a continual state of motion

11. The Particle Theory of Matter
Solid: The state of matter of a substance that has a definite shape and volume.
Ex. A sugar cube
In solids, particles are packed together so tightly they cannot move, only vibrate.
Solid cube of sugar does not need a container to keep it’s shape.

12. The Particle Theory of Matter
Liquid: The state of matter of a substance that has a definite volume, but no definite shape. Ex. Water
In liquids, the particles are farther apart than a solid and can move freely.
This liquid, held in the container. Liquids take the shape of the container that they’re held in.

13. The Particle Theory of Matter
Gas: The state of matter of a substance that has neither a definite shape nor a definite volume. Ex. Oxygen
In gases, the particles are so far apart there are empty spaces between them. They can flow because their particles can move freely.
According to the particle theory, the particles of gas will completely fill a container. This flask doesn’t have a top. Do we think the gas particles would stay within the container? Or do we think it will disperse through the air.

14. 5 Major Points of The Particle Theory
All matter is made up of very small particles.
All particles in a pure substance are the same.
There is space between particles.
Particles are always moving. As they gain energy, they move faster.
The particles in a substance are attracted to one another. The strength of the attractive force depends on the type of particle.

15. Activity time!
Draw the particles of a solid, a liquid and a gas. Please include the movement of these particles.
Remember to give two examples of each state of matter.

16. What is the fourth state of matter?
Plasma is a lot like gases, but the atoms are different because they are made up of free electrons and ions. You don't find naturally occurring plasmas too often when you walk around. They aren't things that happen regularly on Earth.

18. Pg.116 textbook Questions 1-7

19. Flow rate--- the time it takes for a fluid to flow from one point to another point.

20. Read pg.120-121 Discuss Viscosity at Work!

21. Pg.122 Check your understanding Questions 1-5