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Heat and temperature


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For Primary and lower secondary teachers

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Heat and temperature

  2. 2. Road Map Session learning outcomes Definition of atom molecule, element and compound Definition of heat and temperature Difference between heat and temperature Molecular arrangement Molecular movement Transfer of heat
  3. 3. Session Learning Outcomes By the end of this session C.Ps could be able to:  Define atom, molecule, element and compound  Define heat and temperature  Differentiate heat and temperature  Share the concept of molecular arrangement and molecular movement  Understanding Atoms, elements, and molecules Part #1 (9min).flv
  4. 4. Atom and Molecule Atom - It is the smallest unit of a substance. The identity of a substance will be destroyed if its atom is further divided. Different substances will have different types of atoms. All atoms are made up of a number of protons, neutrons and electrons. Molecules - This is the smallest unit of a compound. For example, water is H2O di hydrogen oxide. The water molecule consists of two hydrogen atoms and one oxygen atom which bind together by covalent bonds.
  5. 5. Element and compound Element - It is a substance that cannot be further resolved into simpler substances by chemical means. It consists of a single type of atom of same number of protons. For example, gold and copper are elements with 100% gold atoms and 100% copper atoms, respectively. Compound - It is a substance made of more than one type of atoms. They are usually formed by a chemical process and atoms are bound together by chemical bonds. p
  6. 6. Heat Heat is the total energy of molecular motion in a substance. /differ.html
  7. 7. Temperature Temperature is a measure of the average energy of molecular motion in a substance. Temperature does not depend on the size or type of object. The degree of hotness or coldness of any body.
  8. 8. Difference between Heat and Temperature Heat energy depends on the speed of the particles, the number of particles (the size or mass), and the type of particles in an object. Temperature does not depend on the size or type of object. For example, the temperature of a small cup of water might be the same as the temperature of a large tub of water, but the tub of water has more heat because it has more water and thus more total thermal energy.
  9. 9. Cont…. It is heat that will increase or decrease the temperature. If we add heat, the temperature will become higher. If we remove heat the temperature will become lower. Higher temperatures mean that the molecules are moving, vibrating and rotating with more energy. Arrangement Of Molecules In The Three States Of Matter.flv
  10. 10. Molecular arrangement
  11. 11. Molecular movement Molecules can move in many ways, like. There is translational movement. Molecules can move from one place to another. There is also rotational movement. That is, they can turn around and around. The third way shown here is vibrational movement. 
  12. 12. Food for thought Scientific research can reduce superstition by encouraging people to think and view things in terms of cause and effect. Certain it is that a conviction, akin to religious feeling, of the rationality or intelligibility of the world lies behind all scientific work of a higher order.
  13. 13. Questions Please