Maths
the set of input values for a function
Domain
the distance travelled in a particular direction
displacement
smallest part of an element that can take part in a chemical change
atom
the basic problem in economics in which society does not have enough resources to produce whatever everyone needs and wants
Scarcity
a very tall, thin building, or part of a building
tower
a straight line that touches a curve at a point
Tangent
gradient of velocity-time graph
Acceleration
sub-atomic particles located in nucleus，and its relative charge is zero
neutron
natural resources and raw materials used to make products. Ex: water, vegetation, oil, minerals, and animals.
Land
a long stick with fire at the top of it, used as a light
torch
a rule that maps each x value to just one y value for a defined set of input x value
Function
9.81
Gravitational acceleration/acceleration of gravity/ acceleration of free fall
The arrangement of electrons in an atom
electron configuration
this is the value of the next best alternative when making a choice
Opportunity Cost
the business of trying to persuade people to buy products or services
advertising
the graph of a quadratic function
Parabola
When two bodies interact, the forces they exert on each other are equal in magnitude and opposite in direction
Newton’s third law of motion
the ratio of the weighted average mass of a molecule of a molecular compound to the unified atomic mass unit
relative molecular mass
the benefit from consuming an additional unit of a good or service
Marginal Benefit
a sign or piece of information that helps you solve a problem or answer a question
clue
the part of the quadratic formula underneath the square root sign
Discriminant
Describe a motion: In the absence of air resistance, an object has constant velocity, horizontally and constant acceleration vertically.
Projectile（抛物运动）
the energy needed to remove one electron from each atom in one mole of atoms of the element in the gaseous state to form one mole of gaseous 1+ ions
ionisation energy
a practice used by monopolies in which specific products are sold to different buyers and each consumer is charged the highest price that they are willing and able to pay
Price discrimination
when a newspaper, television programme, etc. shows a particular thing happening
media coverage