Thermodynamics

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Physics 8 Lesson 29: Questions and exercises to summarize Chapter II Thermodynamics

Physics 8 Lesson 29: Questions and exercises to summarize Chapter II Thermodynamics 1. Theoretical summary 1.1. Review questions a. How are substances formed? Substances are made up of separate particles called atoms and molecules. b. State two characteristics of the atoms and molecules that make up the substances studied in this chapter. Atoms and molecules …

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Physics 8 Lesson 21: Heat energy

Physics 8 Lesson 21: Heat energy 1. Theoretical summary 1.1. Heat energy Thermal energy: The sum of the molecular kinetic energy of all the molecules that make up an object is called heat energy All objects have heat energy because the molecules that make up the object are always in motion. Thermal energy depends on …

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Physics 8 Lesson 22: Heat conduction

Physics 8 Lesson 22: Heat conduction 1. Theoretical summary 1.1. Heat conductivity Conduction is the transfer of heat energy from one part of an object to another 1.2. Thermal conductivity of substances a) Experiment 1: – Experimental comments + C4: Do the nails fall at the same time? + C5: What does that phenomenon show? …

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Reason 8 Lesson 19: How are substances made?

Physics 8 Lesson 19: How are substances made? 1. Theoretical summary 1.1. Substances are made up of separate particles – Matter is not a solid block, but substances are made up of separate particles called atoms and molecules. Atoms and molecules are extremely small particles that cannot be seen with the naked eye. Atoms are …

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Physics 8 Lesson 20: Are atoms and molecules moving or at rest?

Physics 8 Lesson 20: Are atoms and molecules moving or at rest? 1. Theoretical summary 1.1. Brown’s Experiment a) Experiment: 1827 – The botanist (British) Berao observed pollen grains in water with a microscope and discovered that they were in constant motion in all directions. When pounded or boiled, the pollen grains are still in …

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