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WorksheetsEnergy Tranfers
Total questions: 12
Worksheet time: 24mins
What are the units for measuring energy?
newtons
degrees Celsius
joules
degrees Fahrenheit
If you leave a cup of hot tea standing in the kitchen for a whole day, what will happen?
No energy will be transferred.
It will gain energy from the air in the kitchen.
Energy will be transferred from the tea to the air until the tea is the same temperature as the air.
Energy will be transferred from the tea to the air in the kitchen, so the tea will end up colder than the air in the kitchen.
The amount of thermal energy in an object depends on three things. Which of these things does it NOT depend on?
its mass
its colour
its temperature
the material it is made from
Which statement about evaporation is NOT true?
When some of a liquid evaporates, the liquid left is warmer than before.
Evaporation can happen at any temperature at which the substance is a liquid.
When some of a liquid evaporates, it is the particles moving the fastest that escape and form a gas.
Sweating cools us down when the sweat evaporates.
Which list of materials shows only insulating materials?
wool, feathers, copper
feathers, wood, carpets
iron, copper, steel
plastic, aluminium foil, wood
Which statement is the best explanation for why many insulating materials contain trapped air?
trapping the air stops energy being transferred by convection
air is a poor conductor
trapped air makes the material lighter
gases are poor conductors and they cannot transfer energy by convection if they cannot move.
When one end of a piece of metal is heated:
the particles vibrate less and so the particles get closer together
the particles vibrate more and the vibrations are passed from particle to particle.
the energy does not move through the metal.
the particles get bigger.
Solids are better heat conductors than liquids or gases because:
the particles are closer together in gases.
the particles are closer together in liquids.
the particles are closer together in solids.
the particles in a solid cannot move.
What are the units for measuring power?
joules
watts
volts
kilowatt-hours
TV's transfer electrical energy into three different energy types. Which is NOT correct?
light
sound
kinetic
heat
Which of these is not a way of trying to reduce energy bills?
increasing the insulation in your home
using more efficient appliances
using appliances with high power ratings
using solar power to heat water
Which statement is correct?
dark colours are good emitters and absorbers of radiation
dark colours are good emitters and poor absorbers of radiation
dark colours are poor emitters but good absorbers of radiation
light colours are good emitters and absorbers of radiation
