Flashcards for synoptic
what is current
The flow of charge
How many loops does a parallel circuit have
more than 1
how many loops does a series circuit have
1
what is current measured in
Amps
what is voltage
The amount of push a cell gives a current in a circuit
what is potential difference
the difference in voltage before and after a component
what is potential difference measured in
volts
what is voltage measured in
volts
what is used to measure potential difference
voltmeter
what is resistance
the opposition to the flow of current in a circuit
what is resistance measured in
ohms
when does static electricity occur
when an object either loses or gains a negative charge
what is a vector
Forces are represented by an arrow, which shows
the size of the force and the direction
what is the driving force
is a push or pull that moves an object
forwards.
what is friction
is a horizontal force which acts on objects
when they move against each other.
what is the support force
is a vertical force that is exerted on
an object that is in contact with another object.
what reduces friction
smooth surfaces
what is then tension force
is transmitted through an object
when it is pulled by forces at opposite ends.
what is the magnetic force
are strongest at the poles of a
magnet.
what are electrostatic forces
occur between opposite
charges. T
what is an electromagnet
When an electric current moves through a wire, a
magnetic field is created.
what do chemical reactions involve
breaking chemical bonds
are chemical reactions reversible
no
what could physical changes be
colour shape size state of maatter
are physical changes reversible
yes
What’s a sign of chemical change
colour changes temperature changes bubbles of gas PH changes change of smell
what does the law of conservation mass state
mass cannot be created or destroyed
what is current
Current is the flow of charge (electrons) around the circuit.
what is thermal decomposition
involves the breaking down of a substance
due to heating.
what is the reaction when oxygen is gained
oxidation
what does combustion mean
burning
what does endothermic mean
reaction takes in energy from the
surroundings.
what does exothermic mean
reaction transfers energy to the surroundings.
what are fuels
materials that can be burnt to release energy
what is condensation
when a gas turns into a liquid
what is melting
when a solid turns into a liquid
what is freezing
when a liquid turns into a solid
what is boiling
when a liquid turns into a gas
what is evaporation
when a liquid turns into a gas
what do gas particles gain when the temperature is increased
Kinetic energy
what are the units of force
newtons
