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Physical properties and kinetic theory Kinetic theory of matter – States all particles of matter are constantly in

Physical properties and kinetic theory Kinetic theory of matter – States all particles of matter are constantly in motion. State (Phase) of matter: Q. What are two things that can happen when energy is added to a substance?. A: Change of temperature or state. Volume (Space Occupied)

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Physical properties and kinetic theory Kinetic theory of matter – States all particles of matter are constantly in

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  1. Physical properties and kinetic theory Kinetic theory of matter – States all particles of matter are constantly in motion. State (Phase) of matter: Q. What are two things that can happen when energy is added to a substance?

  2. A: Change of temperature or state

  3. Volume (Space Occupied) Ex. Even concrete needs to expand due to heat. Expansion joints are created in bridges and roads to allow for this natural adjustment. Q: What are two ways to measure volume?

  4. Measuring Volume • V=lwh • Graduated Cylinder • Fluid Displacement

  5. Mass (Amount of matter an object or substance contains) Q. What tool might be used to find the mass of an object?

  6. Balance

  7. Density Density – Amount of matter present in a certain volume. Density = Mass/volume Q: How does this relate to kinetic theory?

  8. Physical properties cont. Viscosity Tendency of a substance to resist flow Results in slower or faster movement of substance particles. Low energy = low heat = thickness and slow flow. Ex. (honey from refrigerator) High energy= high heat = thinner and faster flow. Ex. (honey from microwave) Kk Substances get thicker as temperatures (energy amount) lower. Substances get thinner as temperatures rise.

  9. How does viscosity relate to kinetic theory? • Draw and label how the molecules of a viscous substance might be different from a non-viscous substance.

  10. Solubility (How a substance dissolves in a given volume of liquid.) Ex. Salt or sugar dissolves much better than dirt in a given volume of liquid What happens to mud or dirt when It’s put in water? Dirt in solvent(different properties than sugar)

  11. NEW VOCABULARY!! • Dissolving - disappearing visually in a solvent • Solute – substance (usually a solid) being dissolved in a liquid. • Solvent– substance (usually a liquid) doing the dissolving.

  12. Think back to lab… Temperature most definitely determines how quickly something can dissolve!! Sugar in hot coffee vs. cold coffee Cold Solvent Hot Solvent

  13. Malleability Ability of a substance (usually metals) to be formed into different shapes without breaking. • Metals have many uses in the world because of this property. • Can you name a few?

  14. Physical Change Any change that is made to a substances physical properties - observed without changing the identity (internal makeup) of a substance. - Always ask yourself if the identity of the substance is the same or not following a change. What happens to water as it goes from liquid to a solid? Is this a physical change or not ( a chemical change)?

  15. Image Sources • Teachersource.com • Mrsdlovesscience.com • www.123rf.com

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