Primary General Science Glossary

This is a general primary science glossary. For class specific glossaries please go to the specific subjects


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L

Landslide

A rapid down slope mass movement where water in the soil and rock has accumulated to sufficiently increase stress and lubricate bedding planes.

LED

A type of a semi-conductor or ‘solid state’ light source. LED’s can produce a very bright light for a small amount of power. LED’s are now used in many applications, for example car brake lights and traffic lights, although white coloured LEDs are still a relatively new technology.

Leonardo da Vinci

Leonardo da Vinci, born in 1452, is considered as perhaps the most diversely talented person ever to have lived. Primarily known as an artist for his paintings and sculpting, he was also a scientist, mathematician, engineer, inventor, musician, writer and architect and was recognized in many more fields! It is even rumoured that he could paint with one hand and write with the other at the same time. Although relatively few of his designs were constructed or were even feasible during his lifetime, Leonardo is praised for his technological ingenuity. He conceptualised a helicopter, a tank, concentrated solar power, a calculator and many, many more during his lifetime!

Lever

A rigid bar used to apply pressure at one point along its length by applying a force (effort) at a second point and turning about a third point or fulcrum.

Life cycle

A life cycle is the different stages of life for a living thing.

Lift

A fluid flowing past the surface of a body exerts a surface force on it. Lift is defined to be the component of this force that is perpendicular to the oncoming flow direction. Lift Take off or away by decreasing the air pressure.

Light

Light is the energy that allows us to see the world. A light source makes light by using another kind of energy (for example heat or nuclear energy).

Lignum

Wooden tissue. This may or may not contain the bark of the tree as well.

Liquid

Liquid is one of thre three states of matter on Earth. A liquid forms a poo, flows or runs but it can't be stretched or squeezed.

Litmus

A colouring material (obtained from lichens, a composite organism consisting of fungi) that turns red in acid solutions and blue in alkaline solutions. It is used as a very rough acid-base indicator.

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