Moton Flashcards
Distance
length between two points. Unit is metres (m).
Speed
Distance travelled divided by time taken (m/s).
Time
How long it takes to do something (s).
Distance-time graph
Graph drawn using time on x axis and distance on y axis. The slope gives the speed.
Current electricity
The steady flow of charge though wires and circuits.
Static electricity
When two objects come into contact, electrons can transfer between them. When this happens, both objects become charged with static electricity.
Charges particles
Particles that have lost or gained electrons
Conductors
A substance that allows energy, such as heat or electricity, to pass through it easily.
Insulators
A substance that does not allow energy, such as heat or electricity, to pass through it easily.
Negative
Electrons have a negative charge. If an object gains electrons, it becomes negatively charged.
Positive
An object that has lost electrons takes on a positive charge
Components
the objects in an electrical circuit e.g. bulb, speaker.
Circuit diagram
A drawing using symbols to represent how a circuit is set up.
Current
the rate of flow of charge per second. Symbol is (I). Measured using an ammeter.
Ammeter
Equipment used to measure current (I).
Potential difference
When there is a point of high electrical energy and a point of low electrical energy in a circuit, there is a difference in electrical potential energy between these points. It is called potential difference.
Voltage
Another word for potential difference. Measured in Volts (V) using a voltmeter.
Resistance
a measure of how difficult it is for an electric current to pass through a substance.Unit is the Ohm. Measured using an ohmmeter.
Scalar
A measurement that has size (magnitude) only. They do not have direction associated with them. E.g. distance, speed, time.
Vector
A measurement that has size (magnitude) only. They do not have direction associated with them. E.g. distance, speed, time.
Displacement
is the distance an object travels in a certain direction. E.g. 50 metres North.
Velocity
is the speed of an object in a given direction. E.g. 10 m/s south.
Distance-time graph
Graph drawn using time on x axis and distance on y axis. The slope gives the speed.
Current electricity
The steady flow of charge though wires and circuits.
Static electricity
When two objects come into contact, electrons can transfer between them. When this happens, both objects become charged with static electricity.
Charges particles
Particles that have lost or gained electrons
Conductors
A substance that allows energy, such as heat or electricity, to pass through it easily.
Insulators
A substance that does not allow energy, such as heat or electricity, to pass through it easily.
Negative
Electrons have a negative charge. If an object gains electrons, it becomes negatively charged.
Positive
An object that has lost electrons takes on a positive charge
Components
the objects in an electrical circuit e.g. bulb, speaker.
Circuit diagram
A drawing using symbols to represent how a circuit is set up.
Current
the rate of flow of charge per second. Symbol is (I). Measured using an ammeter.
Ammeter
Equipment used to measure current (I).
Potential difference
When there is a point of high electrical energy and a point of low electrical energy in a circuit, there is a difference in electrical potential energy between these points. It is called potential difference.
Voltage
Another word for potential difference. Measured in Volts (V) using a voltmeter.
Resistance
a measure of how difficult it is for an electric current to pass through a substance.Unit is the Ohm. Measured using an ohmmeter.
Example of nature selection
peppered moth. Lighter moths survive in less polluted areas, darker ones survive in the cities. The genes for light or dark wings are passed on more often depending, on where they live.
