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Temperature and Particle Movement

Temperature and Particle Movement. EQ: How do I know kinetic energy is the basis of temperature?. Matter and moving particles. All matter is made of atoms Atoms are always in motion Motion of atoms give off energy. EQ: How do I know kinetic energy is the basis of temperature?.

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Temperature and Particle Movement

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  1. Temperature and Particle Movement EQ: How do I know kinetic energy is the basis of temperature?

  2. Matter and moving particles • All matter is made of atoms • Atoms are always in motion • Motion of atoms give off energy EQ: How do I know kinetic energy is the basis of temperature?

  3. Kinetic Theory of Matter • All the particles that make up matter are constantly in motion • Explains the different states of matter EQ: How do I know kinetic energy is the basis of temperature?

  4. Kinetic Theory of Matter • Solid • Particles are not free to move around very much • Vibrate back in forth in the same position • Held tightly together by forces of attraction EQ: How do I know kinetic energy is the basis of temperature?

  5. Kinetic Theory of Matter • Liquid Particles • Move more freely than solids • Constantly sliding around and tumbling over each other as they move EQ: How do I know kinetic energy is the basis of temperature?

  6. Kinetic Theory of Matter • Gas Particles • Are far apart • Move at high speeds • Might collide with one another, but otherwise they do not interact EQ: How do I know kinetic energy is the basis of temperature?

  7. Particle Speed • Do not always move at the same speed even in the same object • A fast moving particle may strike another particle and lose speed • A slow moving particle may strike a faster one and pick up speed EQ: How do I know kinetic energy is the basis of temperature?

  8. Temperature • A measure of the average kinetic energy of all the particles in an object, not just speed • If a liquid has a high temperature, the particles are….. Moving faster This means the kinetic energy is high EQ: How do I know kinetic energy is the basis of temperature?

  9. Temperature Scales • Degrees • Used to measure temperatures • Equally spaced units between two points • To establish a temperature we usually use the freezing and melting points of water EQ: How do I know kinetic energy is the basis of temperature?

  10. Celsius • SI Unit for measuring temperature • Freezing is 0 • Boiling is 100 EQ: How do I know kinetic energy is the basis of temperature?

  11. Why does a thermometer’s fluid go up? • Measures temperature through the regular variation of some physical property of the material inside the thermometer • Measures temperatures because the liquid inside the thermometer always expands or contracts by a certain amount in response to a change in temperature EQ: How do I know kinetic energy is the basis of temperature?

  12. Thermal Expansion All gases, many liquids and most solids expand when their temperature increases • Property that makes liquid filled thermometers work EQ: How do I know kinetic energy is the basis of temperature?

  13. Expansion Joints • Used to build highways and bridges • Short segments with slight breaks in highways and bridges • Allows the material to expand easily EQ: How do I know kinetic energy is the basis of temperature?

  14. Class Work and Homework • Fill In • What did I learn • Confused • Say • Read pages 37 – 42 • Answer questions 1-6 • Questions 1 – 3, plus the challenge question on page 43 EQ: How do I know kinetic energy is the basis of temperature?

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