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Grade 6, Chapter 9

Grade 6, Chapter 9

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OLM Science6_9 OLM Science6_9 Presentation Transcript

  • Chapter 9 Heat & Heat Technology Temperature Section 1
  • Temperature
    • Measure of the average kinetic energy of the particles in an object
  • Kinetic Energy
    • The particle with the higher amount of kinetic energy will have the higher temperature
  • Thermal Expansion
    • The increase of the volume of a substance due to an increase in temperature
  • Fahrenheit Temperature Scale
    • Water boils 212 – Body Temp 98.6 Room Temp 68 - Water freezes 32
  • Celsius Temperature Scale
    • Water boils 100 – Body Temp 37 Room Temp 20 - Water freezes 0
  • Kelvin Scale
    • Water boils @ 373–Body Temp 310 Room Temp 293-Water freezes 273
  • Absolute Zero
    • The lowest temperature on the Kelvin scale (k) is 0 K
  • Thermal Expansion
    • Segments expand when temperature rises and contracts when the temperature drops
  • Chapter 9 Heat & Heat Technology What is Heat? Section 2
  • Heat
    • Transfer of energy between objects that are different temperatures
  • Thermal Energy
    • The total kinetic energy of the particles that make up a substance
  • Thermal Equilibrium
  • Conduction
    • Transfer of thermal from one substance to another
  • Conductors
    • Substances that conduct thermal energy
  • Insulators
    • Substances that do not conduct thermal energy
  • Convection
    • Transfer of thermal energy by movement of liquid or gas
  • Radiation
    • Transfer of thermal energy through space
  • Greenhouse Effect
  • Specific Heat Capacity
    • Amount of energy need to change the temperature of a substance by 1 degree Celsius
  • Calculating Heat
    • Energy transferred(J) = Specific heat capacity(J/kg X C) X mass (kg) X change in temperature (C)
    • J = (j/kg X C)X(kg)X(C)
  • Calories & Kilocalories
    • Kilocalorie (kcal) is equal to 1,000 calories
    • Calories (with capital C) is equal to 1,000 calories
  • Chapter 9 Heat & Heat Technology Matter Heat Section 3
  • States of Matter
    • Physical forms in which a substance can exist
  • Particles of Solid
    • Particles do not move fast enough to overcome the strong attraction between them
  • Particles of Liquid
    • Move fast enough to overcome some of the attraction between them
  • Particles of Gas
    • Move fast enough to overcome nearly all of the attraction between them
  • Change of State
    • Conversion of a substance from one physical form to another
  • Changes of State for Water
  • Chemical Changes
    • Changes that occur when one or more substances are changed into entirely new substances
  • Chapter 9 Heat & Heat Technology Heat Technology Section 4
  • Steam Heating System
  • Hot-Water Heating System
    • Water is heated then pumped through pipe work that leads to radiators in each room
  • Warm Air Heating System
    • Air heated in a separate chamber in the furnace. Warm air travels through ducts to different rooms
  • Insulation
    • Substance that reduces the transfer of thermal energy
  • Solar Heating Systems
    • Passive – Do not have moving parts
    • Active Solar – Have moving parts
  • Heat Energy
    • A machine that uses heat to do the work
  • External Combustion Engine
    • Simple steam engine
  • Internal Combustion Engine
    • Fuel is burned inside the engine
  • Air Conditioner
    • Transfers thermal energy inside the building or car to an area outside
  • How a Refrigerator Works
    • Compressor
  • How a Refrigerator Works
    • Condenser Coils
  • How a Refrigerator Works
    • Expansion Valve
  • How a Refrigerator Works
    • Evaporating Coils
  • Thermal Pollution
    • Excessive heating of a body of water