and Answer (2026/2027) | Verified Practice
Material | A+ Verified
• Energy cannot be... . CORRECT ANSWER: created nor destroyed
• In what ways can energy be transferred? . CORRECT ANSWER: Mechanically,
electrically, by heating, by radiation
• An open system: . CORRECT ANSWER: energy and matter can be transferred
between the system and its surroundings
• When you burn fuel. E.g. logs on a fire. Which energy store is the energy transferred
from and to? . CORRECT ANSWER: From its chemical energy store to the thermal
energy store of the surroundings.
• Energy is transferred to a light bulb electrically.
How is energy transferred away from the bulb? . CORRECT ANSWER: Via light , by
heating
• What is kinetic energy? . CORRECT ANSWER: the energy an object has due to its
motions
• What two measurements are required to calculate kinetic energy of an object? .
CORRECT ANSWER: velocity and mass
• What are the units for energy? . CORRECT ANSWER: Joules (J)
• What are the units of weight? . CORRECT ANSWER: Newtons
• Every object in the universe attracts every other object.
What two factors determine the strength of the gravitational force of attraction? .
CORRECT ANSWER: The distance between the objects
The mass of the objects
• is weight or mass a force? . CORRECT ANSWER: weight is a force
• As an object rises, what energy transfers occur? . CORRECT ANSWER: KE is
converted to GPE
• As an object falls, what energy transfers occur? . CORRECT ANSWER: GPE is
converted to KE
• KE lost= . CORRECT ANSWER: GPE gained
,• As a ball falls, the energy is transferred via... . CORRECT ANSWER: mechanical
energy transfer
• What is specific heat capacity? . CORRECT ANSWER: The amount of energy
required to increase the temperature of 1kg of a substance by 1oC
• What is internal energy? . CORRECT ANSWER: The energy stored by the particles
that make up a system or substance
• What two stores is internal energy comprised of? . CORRECT ANSWER: kinetic and
potential energy stores
• What is temperature? . CORRECT ANSWER: The measure of the average kinetic
energy of the molecules.
• The particles in a solid have kinetic energy because... . CORRECT ANSWER: they
are vibrating
• The particles in a liquid or gas have kinetic energy because... . CORRECT ANSWER:
they move around
• A material with a higher specific heat capacity requires: . CORRECT ANSWER: More
energy to change its temperature
• What happens to dissipated energy? . CORRECT ANSWER: It is lost to the
surroundings
• An open system is a system that ______________. . CORRECT ANSWER: exchange
matter and energy with its surroundings
• How does conduction work? . CORRECT ANSWER: One end of a solid object is
heated, energy is transferred to the kinetic energy
Particles vibrate faster, so they collide with neighbouring particles more often.
Collisions transfer kinetic energy, neighbours vibrate faster and collide more often with
their neighbours.
Process repeats over and over so energy is passed along the object
The kinetic energy that's being passed between particles is referred to as heat (or
thermal energy) that's being transferred.
• What is thermal conductivity? . CORRECT ANSWER: how well a material conducts
heat
, • What is convection? . CORRECT ANSWER: heat energy is transferred by particles
moving position rather than just vibrating
• How does convection work? . CORRECT ANSWER: As a fluid is heated, particles at
the bottom lose density and rise.
They cool and sink when they reach the top, and are replace by newly heated, rising
particles.
This creates a convection current
• Conduction primarily takes place in:
Convection primarily takes place in: . CORRECT ANSWER: solids
liquids and gases
• When we say heat energy is transferred by 'radiation', we are referring to: .
CORRECT ANSWER: infrared
• warm fluids rise because . CORRECT ANSWER: they are less dense than cooler
fluids
• Do hotter or cooler objects emit more infrared radiation? . CORRECT ANSWER:
hotter
• How can we reduce heat loss in homes by conduction? . CORRECT ANSWER: -
Thick walls (low thermal conductivity material)
-Cavity wallsl
-Double glazed windows (air gap is a bad conductor of heat)
• How can we reduce friction which causes loss of energy? . CORRECT ANSWER: -
Lubricant (oil)
-Streamlined shape (cars and planes)
• How can we stop heat loss in homes by convection? . CORRECT ANSWER: -foam
seals around windows and doors
-foam in cavity walls
-double glazed windows
• what is being described by the following sentence?
"The resistance that an object encounters when moving across a solid or moving
through a liquid" . CORRECT ANSWER: friction
• What is efficiency? . CORRECT ANSWER: the percentage of the work input that
becomes work output