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AQA AS PHYSICS 7407/1 Paper 1 Mark scheme (Test Bank) June 2024 With 100% Correct Questions And Answers

AQA AS PHYSICS 7407/1 Paper 1 Mark scheme (Test Bank) June 2024 With 100%  Correct Questions And Answers

AQA AS PHYSICS 7407/1 Paper 1 Mark scheme (Test Bank) June 2024 With 100% Correct Questions And Answers


uses of friction - - rubbing hands for warmth
- break pads on bikes

Efficiency = - Useful Energy Output / Total Energy Input

Increase efficiency - - add lubricant
- reduce friction

internal energy - the sum of the kinetic and potential energies of all particles in the system

Conduction - The direct transfer of heat from one substance to another substance that it is touching.

Convection - The transfer of thermal energy by the circulation or movement of a liquid or gas

convection current - a current caused by the rising of heated fluid and sinking of cooled fluid

Insulator - A material that does not allow heat or electrons to move through it easily.

Infra red radiation - Electromagnetic waves of heat energy.

Radiation - Energy that is radiated or transmitted in the form of rays or waves or particles.

greenhouse effect - CO2 and other greenhouse gases in the atmosphere absorb long wavelength radiation radiated from the Earth's surface and prevent it escaping.

black - good absorber of radiation

white - poor absorber of radiation

specific heat capacity - the energy required to raise the temperature of one gram of a substance by one degree Celsius

Reduce heat loss from homes - - loft insulation (fibre glass is a good insulator)
- cavity wall insulation (foam prevents convection currents)
- aluminum foil behind radiator (reflects radiation)
- double glazing (vacuum slows conduction and radiation)
sound energy - Energy caused by an object's vibrations

thermal energy - The total energy of motion in the particles of a substance

chemical energy - A form of potential energy that is stored in chemical bonds between atoms.

nuclear energy - the potential energy stored in the nucleus of an atom

electrical energy - Energy caused by the movement of electrons.

light energy - Energy in the form of moving waves of light

kinetic energy - energy of motion

gravitional potential energy - potential energy that depends on the height of an object

elastic potential energy - the energy of stretched or compressed objects

conservation of energy - law that says energy cannot be created or destroyed, but can change forms

energy transfer - power x time

non-renewable energy - A natural resource such as coal, gas, or oil that, once consumed, cannot be replaced.

renewable energy - A resource that has a theoretically unlimited supply and is not depleted when used by humans.
solar, wind, geothermal, hydropower, tidal, wave, nuclear, biofuel
dis: unreliable (except hydroelectric and geothermal)

nuclear power - energy from splitting Uranium atoms.
dis: nuclear waste, expensive

carbon neutral - an activity that does not change atmospheric carbon dioxide concentrations

bulb -

resistor -

variable resistor -

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