AQA GCSE Combined Science Physics - Paper 1 Exam
Questions and Answers Grade A+
Energy is transferred between stores - Answer-Thermal, kinetic, gravitational
potential, elastic potential, chemical, magnetic, electrostatic, nuclear
Energy is transferred... - Answer-Mechanically (by a force doing work),
electrically (work done by moving charges), by heating or by radiation (like light
or sound)
When a system changes, energy is transferred - Answer-It can be transferred into or
away from the system, between objects in the system or between different types of
energy stores. Closed systems are where neither matter nor energy can enter or
leave. The net change in the total energy of a closed system is always 0
kinetic energy - Answer-energy of motion - the greater an object's mass and the
faster it is going, the more energy there will be in its kinetic energy store. Ek (j) =
1/2m(kg)v(m/s) squared
Raised objects store energy in gravitational potential energy stores - Answer-lifting
an object in a gravitational field requires work, causing an energy transfer to the
the GPE store of the object. Ep(j) = m(kg)g(n/kg)h(m)
,Falling objects transfer energy - Answer-Falling objects transfer energy from its
GPE store to its kinetic energy store. When there's no air resistance, energy lost
from the GPE store = energy gained in the kinetic energy store
Stretching transfers energy to elastic potential energy stores - Answer-As long as
the limit of proportionality has not been exceeded, Ee (j) = 1/2 k (N/m) e (m)
squared
specific heat capacity - Answer-the energy required to raise the temperature of one
gram of a substance by one degree Celsius. E (j) = m(kg) c(j/kgdegree) theta
(degrees Celsius)
Conservation of energy principle - Answer-Energy can be transferred but can never
be created of destroyed
Dissipated energy - Answer-energy used up in a system, typically lost due to work
done by friction, 'wasted energy'
Phone energy - Answer-When you use the phone, energy is usefully transferred
from the chemical energy store of the battery in the phone, but some of this energy
is dissipated to thermal energy
, Closed system energy transfer - Answer-A cold spoon is dropped into hot soup in
an insulated flask, which is then sealed. Energy is transferred from the thermal
energy store of the soup to the useless thermal energy of the spoon
Power - Answer-The rate at which work is done (watts). P(w) = E(j) / t(s)
Powerful machine - Answer-One which transfers a lot of energy in a short space of
time
Conduction occurs mainly in solids - Answer-Conduction is the process where
vibrating particles transfer energy to neighbouring particles.
Long definition of conduction - Answer-Energy transferred to an object by heating
is transferred to the thermal store, which is shared across the kinetic store of the
particles. The particles' collisions cause energy to be transferred between particles
kinetic energy stores.
thermal conductivity - Answer-the Mrs sure of the rate at which thermal energy can
travel through a material
Convection occurs only in liquids and gases - Answer-Convection is where
energetic particles move away from hotter to cooler regions
Convection longer definition - Answer-Unlike in solids, the particles in liquids and
gases are able to move. When you heat a region of a gas/liquid, the particles move
Questions and Answers Grade A+
Energy is transferred between stores - Answer-Thermal, kinetic, gravitational
potential, elastic potential, chemical, magnetic, electrostatic, nuclear
Energy is transferred... - Answer-Mechanically (by a force doing work),
electrically (work done by moving charges), by heating or by radiation (like light
or sound)
When a system changes, energy is transferred - Answer-It can be transferred into or
away from the system, between objects in the system or between different types of
energy stores. Closed systems are where neither matter nor energy can enter or
leave. The net change in the total energy of a closed system is always 0
kinetic energy - Answer-energy of motion - the greater an object's mass and the
faster it is going, the more energy there will be in its kinetic energy store. Ek (j) =
1/2m(kg)v(m/s) squared
Raised objects store energy in gravitational potential energy stores - Answer-lifting
an object in a gravitational field requires work, causing an energy transfer to the
the GPE store of the object. Ep(j) = m(kg)g(n/kg)h(m)
,Falling objects transfer energy - Answer-Falling objects transfer energy from its
GPE store to its kinetic energy store. When there's no air resistance, energy lost
from the GPE store = energy gained in the kinetic energy store
Stretching transfers energy to elastic potential energy stores - Answer-As long as
the limit of proportionality has not been exceeded, Ee (j) = 1/2 k (N/m) e (m)
squared
specific heat capacity - Answer-the energy required to raise the temperature of one
gram of a substance by one degree Celsius. E (j) = m(kg) c(j/kgdegree) theta
(degrees Celsius)
Conservation of energy principle - Answer-Energy can be transferred but can never
be created of destroyed
Dissipated energy - Answer-energy used up in a system, typically lost due to work
done by friction, 'wasted energy'
Phone energy - Answer-When you use the phone, energy is usefully transferred
from the chemical energy store of the battery in the phone, but some of this energy
is dissipated to thermal energy
, Closed system energy transfer - Answer-A cold spoon is dropped into hot soup in
an insulated flask, which is then sealed. Energy is transferred from the thermal
energy store of the soup to the useless thermal energy of the spoon
Power - Answer-The rate at which work is done (watts). P(w) = E(j) / t(s)
Powerful machine - Answer-One which transfers a lot of energy in a short space of
time
Conduction occurs mainly in solids - Answer-Conduction is the process where
vibrating particles transfer energy to neighbouring particles.
Long definition of conduction - Answer-Energy transferred to an object by heating
is transferred to the thermal store, which is shared across the kinetic store of the
particles. The particles' collisions cause energy to be transferred between particles
kinetic energy stores.
thermal conductivity - Answer-the Mrs sure of the rate at which thermal energy can
travel through a material
Convection occurs only in liquids and gases - Answer-Convection is where
energetic particles move away from hotter to cooler regions
Convection longer definition - Answer-Unlike in solids, the particles in liquids and
gases are able to move. When you heat a region of a gas/liquid, the particles move
