Info Library

Glossary of Terms > E

Ecosystem

An ecological community together with its environment, functioning as a unit.

Edspot

A very sensitive long range galvanometer, often used in electomagnetic induction experiments.

EHT Unit

Stands for Extra High Tension. A high voltage power supply with a high internal resistance which means the current it supplies is low but voltage is high.

Electrolysis

A method of separating bonded elements and compounds by passing an electric current through them.

Electromagnetic induction

The production of electricity by moving a magnet through a coil of wire.

Electromagnetic spectrum

The full range of electromagnetic radiation including ultra violet, microwaves, radio waves etc.

Electron

The electron is a fundamental subatomic particle that carries a negative electric charge and has negligible mass.

Electroscope

A device for detecting the presence of electric charges by means of electrostatic attraction and repulsion, often between two pieces of gold leaf enclosed in a glass-walled chamber. These are often called gold leaf electroscopes. Click here for Gold Leaf Electroscope equipment page.

Element

One of a class of substances that cannot be separated into simpler substances by chemical means.

Enzyme

Proteins which accelerate (catalyze) biochemical reactions. Examples include; protease, amylase, lipase and rennin.