gcse AQA physics P1
how is heat transferred from place to place? - Answers -conduction, convection,
radiation
What surface is better at absorbing heat? - Answers -dark matt surfaces
what surface is better at reflecting heat? - Answers -light shiny surfaces
what objects emit infared radiation? - Answers -all objects. the hotter it is, the more it
emits.
what does infared radiation involve? - Answers -waves! not particles
what can radition pass through? - Answers -vaccum
particles in solids, liquids and gases have ? amounts of energy - Answers -different
describe the particles in a solid - Answers -close together particles, with a regular
pattern.They vibrate and stay in a fixed position
describe the particles in a liquid - Answers -close particles with a random patter. Move
around eachother
describe the particles in a gas - Answers -far apart, random pattern, move quickly and in
any direction
what is conduction - Answers -when heat energy moves through a substance
are metals, or non metals better conductors - Answers -metals
what are non metals and gases - Answers -good insulators
the hotter the metal is... - Answers -the more kinetic energy the vibrations have
what happens in convection - Answers -particles with lots of heat energy get less dense
and rise, replacing particles with less heat energy.
what is it called when a liquid changes to a gas? - Answers -evaporation
what is it called when a gas changes to a liquid - Answers -condensation
what increases condensation rate? - Answers -increase in temperature of gas
, what increases rate of evaporation? - Answers -increase in temperature of liquid,
increase surface area, air moving over liquids surface
the bigger difference in temperature between object and surroundings... - Answers -the
greater rate of heat energy is transferred
small animals have - Answers -large surface area to volume ratio
if small animals have a large surface area to volume ratio - Answers -they lose heat to
surroundings easily and have to eat more to replace energy lost
large animals have - Answers -a small surface area to volume ratio
if large animals have a small surface area to volume ratio - Answers -they lose little heat
to surroundings and may risk over heating
what enables elephants to cool down quickly - Answers -large ears
lower u-value means - Answers -better heat insulator
what does temperature mean - Answers -measure of how hot an object is
what does heat mean - Answers -measure of thermal energy contained
temperature increase depends on - Answers -mass of an object, substance it is made
from, amount of energy transferred to the obect
what are forms of energy - Answers -magnetic, kinetic, heat, light, gravitational
potential, electrical, elastic potential, nuclear
what diagram shows the useful and wasted energy - Answers -sankey diagram
what are fossil fuels - Answers -coal, oil, natural gas
what are advantages of fossil fuels - Answers -they are reliable and quick
what are disadvantages of fossil fuels - Answers -supply is limited, coal and oil release
sulphur dioxide, release carbondioxide when burned, increases global warming,
what releases the most carbon dioxide, coal or natural gases? - Answers -coal
example of a nuclear fuel - Answers -uranium, plutonium
advantages of nuclear fuels? - Answers -dont produce sulphur dioxide or carbon dioxide
how is heat transferred from place to place? - Answers -conduction, convection,
radiation
What surface is better at absorbing heat? - Answers -dark matt surfaces
what surface is better at reflecting heat? - Answers -light shiny surfaces
what objects emit infared radiation? - Answers -all objects. the hotter it is, the more it
emits.
what does infared radiation involve? - Answers -waves! not particles
what can radition pass through? - Answers -vaccum
particles in solids, liquids and gases have ? amounts of energy - Answers -different
describe the particles in a solid - Answers -close together particles, with a regular
pattern.They vibrate and stay in a fixed position
describe the particles in a liquid - Answers -close particles with a random patter. Move
around eachother
describe the particles in a gas - Answers -far apart, random pattern, move quickly and in
any direction
what is conduction - Answers -when heat energy moves through a substance
are metals, or non metals better conductors - Answers -metals
what are non metals and gases - Answers -good insulators
the hotter the metal is... - Answers -the more kinetic energy the vibrations have
what happens in convection - Answers -particles with lots of heat energy get less dense
and rise, replacing particles with less heat energy.
what is it called when a liquid changes to a gas? - Answers -evaporation
what is it called when a gas changes to a liquid - Answers -condensation
what increases condensation rate? - Answers -increase in temperature of gas
, what increases rate of evaporation? - Answers -increase in temperature of liquid,
increase surface area, air moving over liquids surface
the bigger difference in temperature between object and surroundings... - Answers -the
greater rate of heat energy is transferred
small animals have - Answers -large surface area to volume ratio
if small animals have a large surface area to volume ratio - Answers -they lose heat to
surroundings easily and have to eat more to replace energy lost
large animals have - Answers -a small surface area to volume ratio
if large animals have a small surface area to volume ratio - Answers -they lose little heat
to surroundings and may risk over heating
what enables elephants to cool down quickly - Answers -large ears
lower u-value means - Answers -better heat insulator
what does temperature mean - Answers -measure of how hot an object is
what does heat mean - Answers -measure of thermal energy contained
temperature increase depends on - Answers -mass of an object, substance it is made
from, amount of energy transferred to the obect
what are forms of energy - Answers -magnetic, kinetic, heat, light, gravitational
potential, electrical, elastic potential, nuclear
what diagram shows the useful and wasted energy - Answers -sankey diagram
what are fossil fuels - Answers -coal, oil, natural gas
what are advantages of fossil fuels - Answers -they are reliable and quick
what are disadvantages of fossil fuels - Answers -supply is limited, coal and oil release
sulphur dioxide, release carbondioxide when burned, increases global warming,
what releases the most carbon dioxide, coal or natural gases? - Answers -coal
example of a nuclear fuel - Answers -uranium, plutonium
advantages of nuclear fuels? - Answers -dont produce sulphur dioxide or carbon dioxide
