1) What are the units for measuring heat energy? a) newtons b) degrees Celsius c) joules d) degrees Fahrenheit 2) When one end of a piece of metal is heated: a) the particles get closer together. b) the particles vibrate more and the vibrations are passed from particle to particle. c) the heat does not move through the metal. d) the particles get bigger. 3) Which substances can heat travel through by convection? a) solids and liquids b) solids and gases c) only liquids d) liquids and gases 4) Duvets and loft insulation are good insulators because: a) they are soft. b) they do not cost very much. c) they last a long time. d) they contain trapped air. 5) Which is the worst conductor? a) A Metal b) A Gas c) A Vacuum d) A Liquid 6) Which of these has the most gravitational potential energy? a) a parachutist standing on a runway b) a parachutist going into a plane c) a parachutist jumping out of a plane d) a parachutist after landing 7) What are the energy changes in a candle? a) heat to light b) heat to sound c) light to heat d) chemical to heat and light 8) What is the moment for a force of 20N applied 30cm away from a pivot? a) 60Ncm b) 600Nm c) 600Ncm d) 6000Nm 9) A circuit with a battery as a power source is left on all day. What will happen to the reading on an ammeter on the circuit? a) The number of amps will stay the same b) The number of volts will decrease c) The number of amps will decrease d) The number of volts will increase 10) An efficient machine: a) does not waste much energy. b) wastes a lot of energy. c) is more expensive to run than an inefficient machine. d) is more expensive to buy than an inefficient machine 11) Sound travels in air because: a) air particles stay still. b) the wind blows it. c) particles pass on vibrations. d) electricity sends it through the air. 12) A loud sound is produced by waves with: a) a high pitch. b) a high frequency. c) a large amplitude. d) a small amplitude. 13) Look at these drawings of waves. Which statement is true? a) Y has the highest amplitude. b) Y has the longest wavelength. c) X has the highest frequency. d) Y has the highest frequency. 14) Which part of the ear changes sound energy into another form of energy? a) the cochlea b) the ear drum c) the auditory nerve d) the small bones 15) Which does sound travel through the quickest? a) air b) water c) iron d) space 16) Which phrase best completes the following sentence? We see things because: a) they are luminous. b) the Sun shines on them. c) light from them enters our eyes. d) light from our eyes shines on them. 17) Which of these will absorb the most light? a) a white sheet of paper b) a sheet of clear glass c) a black piece of card d) an orange piece of card 18) How big will the angle of reflection be? a) 20 ° b) 30 ° c) 40 ° d) 60 ° 19) Refraction occurs because: a) light speeds up when it meets a denser transparent material. b) light slows down when it meets a denser transparent material. c) light stops when it meets a denser transparent material. d) light reflects inside denser transparent materials. 20) Which statement is not true? a) A rainbow is a spectrum of colours. b) White light is made up of many colours. c) Black light consists of many colours d) A prism can split white light into a spectrum.

energy in action quiz

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