SI (Systeme International d'Unites) | | A measuring stick one metre long that is marked off in centimetres and usually millimetres. |

Metric system | | A unit of linear measure equal to 12 inches (30.48 cm). |

Referent | | A system of measurement based on British units. |

Imperial System | | All areas are measured in square units (mm2, cm2, m2, km2). |

Linear Measurement | | Comparative relation between things or magnitudes as to size, quantity, number, etc.; ratio. |

Millimetre | | According to size and type. |

Centimetre | | Is the process of comparing something with known, standard units. |

Metre | | A 3-Dimensional shape. |

Kilometre | | The basic unit of length adopted under the Systeme International d'Unites (approximately 1, 094 yards). |

Inch | | Is the set of standard measures we use. These include: Length (metre, m), Mass (gram, g), Capacity (litre, L), Time (second, s). |

Foot | | A metric unit of capacity. |

Yard | | The overall area of a 3-D shape. For example, the surface area of a cube is the sum of all areas of all squares that make up the cube. |

Mile | | A metric unit of length equal to one hundredth of a metre. |

Ruler | | A metric unit of volume equal to one thousandth of a litre. |

Caliper | | Volumes are measured in cubic units (mm3, cm3, m3). |

Tape Measure | | A metric unit of length equal to 1000 metres (or 0.621371 miles). |

Circumference | | A unit of linear measure equal to 5,280 feet, or 1,760 yards (about 1,609 kilometres). |

Length | | The act or process of changing something to a different form; state of being changed. |

Width | | A unit or system of units for measuring length where 10 mm equals 1 centimetre, 100 centimetres equals 1 metre and 1000 metres equals 1 kilometre. |

Height | | Extent or distance upward: The balloon stopped rising at a height of 500 feet. |

Perimeter | | A straight strip or cylinder of plastic, wood, metal, or other rigid material, typically marked at regular intervals, to draw straight lines or measure distances. |

3-D Object | | A 3-Dimensional shape. |

Proportion | | A system of measurement in which all units are based on multiples of ten. The metre is the basic unit of length. |

Conversion | | Are measured in units according to size and type. |

Mental Mathematics | | A long, flexible strip or ribbon, as of cloth or metal, marked with subdivisions of the foot or metre and used for measuring. |

Area | | A 3-Dimensional shape. |

Surface area | | An item that an individual uses as a measurement unit for estimating. For example, the height of a doorknob above the floor is about 1 m, or the thickness of a dime is about 1 mm. |

Square units | | The volume of a solid is the 3-dimensional space it takes up. |

Volume | | The capacity of a container is the amount it can contain. It is measured in litres, and is closely related to volume. |

Litre | | Calculations that are done in your head without the guidance of pencil, calculators or other aids. |

Millilitre | | A 3-Dimensional shape. |

Cube units | | The outer boundary, especially of a circular area; perimeter: the circumference of a circle. |

Cone | | A unit of linear measurement equal to one twelfth of a foot (2.54 cm). |

Cylinder | | The longest extent of anything as measured from end to end: the length of a river. |

Prism | | A metric unit of length equal to one thousandth of a metre. |

Pyramid | | The border or outer boundary of a two-dimensional figure. |

Sphere | | An instrument for measuring external or internal dimensions, having two hinged legs resembling a pair of compasses and in-turned or out-turned points. |

Metre stick | | Extent from side to side; breadth; wideness. |

Measuring | | Representing something in three dimensions. |

Quantities | | The area of a shape is the flat space contained within it. |

Units | | A 3-Dimensional shape. |

Capacity | | A unit of linear measure equal to 3 feet (0.9144 meter). |