P1.1 Energy

 ELeanor Turner
Mind Map by ELeanor Turner, updated more than 1 year ago
 ELeanor Turner
Created by ELeanor Turner over 5 years ago
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GCSE Physics Mind Map on P1.1 Energy, created by ELeanor Turner on 04/15/2016.

Resource summary

P1.1 Energy
  1. Infrared Radiation
    1. All objects emit and absorb infrared radiation
      1. The hotter an object the more infrared radiation it radiates
        1. Dark, matt surfaces
          1. Good absorbers
            1. Good emitters
            2. Light, shiny surfaces
              1. Poor absorbers
                1. Poor emitters
                  1. Good reflectors
              2. Kinetic Theory
                1. Solids
                  1. Strong forces of attraction
                    1. Particles have little energy
                      1. Particles vibrate around fixed positions
                        1. Regular and fixed arrangement
                      2. Liquids
                        1. Weaker forces of attraction
                          1. Irregular arrangement
                            1. More energy than solids
                              1. Move in random directions at slower speeds
                              2. Gases
                                1. No attraction
                                  1. No arrangement
                                    1. Random directions at high speeds
                                      1. Lots of energy
                                    2. Energy Transfer by heating
                                      1. Energy transfers
                                        1. Conduction
                                          1. Vibrating particles pass on kinetic energy
                                            1. Faster in solids
                                              1. Particles closer; collide more often
                                              2. Metals good conductors
                                                1. Free electrons collide with particles
                                            2. Convection
                                              1. Area gets hot
                                                1. Particles move further apart
                                                  1. Area less dense
                                                    1. Lighter
                                                      1. So it rises
                                                        1. Starts to cool
                                                          1. Falls back down
                                              2. Evaporation
                                                1. Liquid turns into gas
                                                  1. Particles with most energy overcome forces of attraction and escape
                                                    1. Affects rate
                                                      1. Temperature
                                                        1. Faster if higher
                                                        2. Density
                                                          1. Faster if lower
                                                          2. Surface area
                                                            1. Faster if larger
                                                            2. Airflow
                                                              1. Faster if greater
                                                        3. Condensation
                                                          1. Gas turns into liquid
                                                            1. Particles lose kinetic energy
                                                              1. Affects rate
                                                                1. Temperature
                                                                  1. Faster if lower
                                                                  2. Temperature of surface
                                                                    1. Faster if lower
                                                                    2. Density
                                                                      1. Faster if higher
                                                                      2. Airflow
                                                                        1. Faster if less
                                                                2. Rate at which an object transfers energy by heating depends on
                                                                  1. Surface area and volume
                                                                    1. Nature of the surface
                                                                      1. Material
                                                                      2. The bigger the temperature difference between an object and its surroundings
                                                                        1. The faster the rate at which energy is transferred by heating
                                                                      3. Heating and insulating buildings
                                                                        1. U- Value
                                                                          1. How effective an insulator it is
                                                                            1. The lower the better
                                                                          2. Specific heat capacity
                                                                            1. Amount of energy required to change the temperature of one kilogram of the substance by one degree celsius
                                                                              1. E = m x c x 0 (theta)
                                                                            2. Solar panels
                                                                              1. Contain water which is heated by sun, water then used to heat buildings or provide hot water
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