March 31B Day Do Now: Identify the form of heat transfer that is taking place in each of the pictures. There may be more than one! Also, take out yesterday’s worksheet. Homework: Study chapter 6 lessons 1 & 2 Review all videos we have watched too! A. B.

What to know for the test… Definitions of heat, temperature, thermal energy and the differences between each What is specific heat? Conductors vs. Insulators 3 types of heat transfer Temperature conversions Thermal expansion vs. contraction

Definitions Heat-transfer of thermal energy from a warmer object to a cooler object Temperature-a measure of the average kinetic energy of the particles of a material Thermal Energy- sum of the KE + PE of the particles of a substance Specific Heat-amount of energy needed to raise 1 kg by 1C Conductor-allows for easy flow of thermal energy Insulator-prohibits the flow of thermal energy Conversions C to F and reverse; C to K and reverse Expansion -MOST materials expand when heated Contraction-MOST materials contract when cooled Ex: expansion joints in sidewalks, bridges, etc

3 types of heat transfer Conduction – transfer of heat through direct contact; KE of molecules is passed from higher to lower; ex: fire to pot, pot to water Convection – transfer of heat from particles of the same material ex: water at bottom to water at top Radiation – transfer of heat through electromagnetic waves, ex: the sun, microwave, sides of a camp fire