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G RADE 8 S CIENCE U NIT 3: F LUIDS &

G RADE 8 S CIENCE U NIT 3: F LUIDS &. V ISCOSITY. Chapter 7: Viscosity describes a fluid’s resistance to flow. PTM... A REVIEW PG . 270.  All. matter is made up of. very tiny particles.  All particles in a pure substance are the same but different from another substance.

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G RADE 8 S CIENCE U NIT 3: F LUIDS &

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  1. GRADE 8 SCIENCE UNIT 3: FLUIDS & VISCOSITY Chapter 7: Viscosity describes a fluid’s resistance to flow

  2. PTM... A REVIEW PG. 270 All matter is made up of very tiny particles. All particles in a pure substance are the same but different from another substance.

  3. There is space between the particles. The particles are always moving. They move faster if they gain energy. There are attractive forces between the particles. Some strong; some weak.

  4. CAN YOU IDENTIFY THE 3 STATES OF MATTER?

  5. 3 STATES OF MATTER... A REVIEW

  6. FLUIDS Any form of matter that flows. Since liquids and gases do NOT have a definite shape they are able to flow making them fluids.

  7. WE USE FLUIDS EVERYDAY. FOR EXAMPLE... Food fluids (water, oil, maple syrup, honey, etc) Cleaning fluids and creams Bodily fluids Industrial fluids (compressed air in tires, lubricants, etc)

  8. VISCOSITY A measure of a liquid’s resistance to flow. The thickness or thinness of a fluid. A fluid that is viscous is the one that is NOT “runny” (flows slowly).

  9. VISCOSITY & FRICTION? Friction resists movement. The greater the friction, the greater the viscosity. The particles are holding on tightly to each other.

  10. VISCOSITY IS IMPORTANT IN OUR EVERYDAY LIFE.

  11. FLOW RATE The speed at which a fluid flows from one point to another.

  12. 7-2 B pg. 282-3 Core Lab Activity THE FLOW RATE OF LIQUIDS

  13. FACTORS THAT AFFECT VISCOSITY Temperature: As you increase temperature, you decrease a fluid’s viscosity. As you decrease temperature, you increase a fluid’s viscosity. The opposite is true of gases.

  14. Concentration: The amount of a substance dissolved in a specific volume. Increasing the concentration, increases the viscosity.

  15. Attractive Forces: If the attractive forces are strong, it is difficult for the particles to pull away thereby the fluid flows slowly and is more viscous.

  16. Particle size: The smaller the particle size, the faster the fluid flows and is less viscous.

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