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Energy Questions, GCSE questions and answers. graded A+

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Describe the energy changes that take place when an object is projected upwards. Kinetic energy is changed into gravitational potential energy. 2 Describe the energy changes that take place when... a moving object hits an obstacle. Kinetic energy is changed into wasted forms of energy, e.g. sound and thermal. 3 Describe the energy changes that take place when an object is accelerated by a constant force. The kinetic energy of the object increases. 4 Describe the energy changes that take place when a vehicle slows down. Kinetic energy is changed into thermal energy by the brakes. 5 Describe the energy changes that take place when water is boiled in an electric kettle. Electrical energy is changed into thermal energy. 6 Define 'power'. The rate at which energy is transferred / the rate at which work is done. 7 State two equivalent units of measurement for power. Watt (W) or Joules per second (J/s) 8 Define the specific heat capacity of a substance. The energy required to raise the temperature of 1kg of a substance by 1°C. 9 Describe what is meant by the thermal conductivity of a material. The rate at which heat energy is conducted across the material. 10 List the main energy resources available for use on Earth. Fossil fuels (coal, oil and gas), nuclear, biofuel, wind, hydroelectricity, geothermal, tidal, solar and wave. 11 State some of the main uses for energy resources. Transport, electricity generation and heating [Show More]

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