AQA GCSE PHYSICS ENERGY PRACTICE
SOLUTION STUDY SHEET QUESTIONS AND
DETAILED ANSWERS
●● What happens to energy stores when a system changes?
Answer: Energy is transferred between stores.
●● Can energy be created or destroyed?
Answer: No, energy can only be transferred, stored or dissipated.
●● What is the unit of energy?
Answer: Joules, J.
●● What is a closed system?
Answer: A system where no energy enters or leaves.
●● What happens to total energy in a closed system?
Answer: The total energy stays constant.
●● What is a useful energy transfer?
Answer: Energy transferred to the store or place where it is wanted.
,●● What is wasted energy?
Answer: Energy transferred to a store or place where it is not useful.
●● What does dissipated energy mean?
Answer: Energy spread out into less useful stores, usually thermal
energy of the surroundings.
●● What is the kinetic energy store?
Answer: The energy store of moving objects.
●● What is the gravitational potential energy store?
Answer: The energy store of objects raised in a gravitational field.
●● What is the elastic potential energy store?
Answer: The energy store of stretched, compressed or bent objects.
●● What is the thermal energy store?
Answer: The energy store linked to the temperature of an object.
●● What is the chemical energy store?
Answer: The energy store in fuels, food, batteries and chemicals.
, ●● What is the nuclear energy store?
Answer: The energy store inside atomic nuclei.
●● What is the magnetic energy store?
Answer: The energy store of magnets or magnetic objects that interact.
●● What is the electrostatic energy store?
Answer: The energy store of electric charges that interact.
●● How is energy transferred when an object is heated?
Answer: Energy is transferred to its thermal store.
●● How is energy transferred when work is done by a force?
Answer: Energy is transferred mechanically.
●● How is energy transferred when charge flows in a circuit?
Answer: Energy is transferred electrically.
●● How is energy transferred by light or infrared?
Answer: By radiation.
SOLUTION STUDY SHEET QUESTIONS AND
DETAILED ANSWERS
●● What happens to energy stores when a system changes?
Answer: Energy is transferred between stores.
●● Can energy be created or destroyed?
Answer: No, energy can only be transferred, stored or dissipated.
●● What is the unit of energy?
Answer: Joules, J.
●● What is a closed system?
Answer: A system where no energy enters or leaves.
●● What happens to total energy in a closed system?
Answer: The total energy stays constant.
●● What is a useful energy transfer?
Answer: Energy transferred to the store or place where it is wanted.
,●● What is wasted energy?
Answer: Energy transferred to a store or place where it is not useful.
●● What does dissipated energy mean?
Answer: Energy spread out into less useful stores, usually thermal
energy of the surroundings.
●● What is the kinetic energy store?
Answer: The energy store of moving objects.
●● What is the gravitational potential energy store?
Answer: The energy store of objects raised in a gravitational field.
●● What is the elastic potential energy store?
Answer: The energy store of stretched, compressed or bent objects.
●● What is the thermal energy store?
Answer: The energy store linked to the temperature of an object.
●● What is the chemical energy store?
Answer: The energy store in fuels, food, batteries and chemicals.
, ●● What is the nuclear energy store?
Answer: The energy store inside atomic nuclei.
●● What is the magnetic energy store?
Answer: The energy store of magnets or magnetic objects that interact.
●● What is the electrostatic energy store?
Answer: The energy store of electric charges that interact.
●● How is energy transferred when an object is heated?
Answer: Energy is transferred to its thermal store.
●● How is energy transferred when work is done by a force?
Answer: Energy is transferred mechanically.
●● How is energy transferred when charge flows in a circuit?
Answer: Energy is transferred electrically.
●● How is energy transferred by light or infrared?
Answer: By radiation.
