Learn what quicklime is, how it can burn one's skin, how it is made, its chemical properties, and how it is used in industry and for other things.

Explains what is meant by a double displacement reaction and gives some examples.

Provides information about the top ten gold-producing countries, including how much they produce and what percent of foreign currency reserves that is.

Presents a list of the most precious metals, their properties, and how they are used.

Describes an experiment in turbulent and laminar flow in order to illustrate these concepts in fluid mechanics and how this applies to the Reynolds Number. Gives several examples of applications of the Reynolds Number.

Explains the distinction between the two main types of chromatography - analytical and preparative - and describes eleven chromatography techniques.

A bolometer is an instrument used to measure radiant energy. Learn about its history, its advantages, how it works, some different types, and its important applications.

Gives a brief history of electromagnets and describes the parts of an electromagnet and how one works. Includes labeled illustrations and examples of their many applications.

Explains the processes of radioactive decay in primary and secondary modes.

Explains what a compound microscope is, the different parts, how it works, and what it is used for.

Discusses the importance of the microscope to scientists and the many different types and what they are used for.

Looks at the differences and similarities between a light microscope and an electron microscope. Discusses their structure, how images are formed, their resolution and magnification, how color is manifested, their portability, cost, and...

Uses illustrations with labels to complement a detailed examination of the parts and functions of a light microscope and an electron microscope.

Provides information about the five layers of Earth's atmosphere. Also discusses the satellites that orbit the Earth in the atmosphere.

The photic zone is the upper layer of the ocean where sunlight can penetrate and support photosynthesis. This article explains the characteristics of this zone, the food chain that exists there, the adaptations of the plants and animals,...

Tells the story of how Archimedes discovered the Archimedes Principle and his water displacement method for determining the volume and density of an object. Provides an explanation and several examples of how it is done.

The density triangle is a memory tool to help students remember the formula for density, D = M / V, and its variations.

Explains what cohesion and adhesion are; what their effects are in a liquid; what surface tension, a meniscus, and capillary action are; and gives examples of where one can observe cohesion and adhesion.

Defines capillary action and discusses its applications. The physics of surface tension, cohesion, and adhesion are explained and a simple experiment is provided. Includes a number of examples where capillary action takes place.

Presents three easy experiments where you can make water glow in the dark.

Explains what a triple beam balance does, how it is constructed, and how it functions.

A useful list of electrical symbols that are used in schematic diagrams. Each symbol is accompanied by its name and a caption stating its function.

Discusses the importance of solvent extraction, provides examples, looks at the importance of appropriate solvent selection, describes the conditions needed for extraction, and explains some of the methods used.

Explains what an LCR meter is and how it is used to measure the inductance, capacitance, and resistance of a circuit. Lists the different parameters of a circuit that it measures, describes two types of LCR meters, and gives definitions...