Learn facts about the mesosphere, one of the five layers of the atmosphere.

Lists all the countries in the world that are landlocked. Gives area, population, capital, and bordering countries, as well as a map for each of the largest countries. This is followed by a list of other landlocked countries and their...

Lists the 49 countries in Asia and their capitals, organized by geographical region.

Describes different landform types and their features. includes many good quality photographs.

Learn about the many specializations in the field of geography within its two branches of physical and human geography.

Learn facts about the stratosphere, one of the five layers of the atmosphere.

Explains what is meant by the theory of environmental determinism, its origins and history, and its decline in popularity. Also presents examples of environmental determinism.

Explains the difference between environmental possibilism and environmental determinism and presents a chart comparing the tenets of each theory.

Describes the different branches of Philosophy and what their relevance is to today's world.

Explains the how a converse statement differs from an inverse statement, how to write a converse statement, and gives some examples of converse statements.

Discusses how to calculate the density of water and how density varies depending on the temperature and the salinity. Presents a chart showing the difference in the density of non-saline water for temperatures between 0 and 100 degrees...

Presents biographical information about Rene Descartes (1596-1650), his career, personal life, written works, and his legacy. Covers contributions to philosophy, mathematics, and science.

Provides detailed instructions for how to help a student make a solar system model, and additional suggestions for making a constellation poster, making a model showing phases of the moon, and creating a solar system model to scale.

Step-by-step instructions accompanied by illustrations that demonstrate how to use a protractor to draw angles and to measure angles.

Find inspiration to learn everything you can about science and space in these quotes from celebrity scientist Neil deGrasse Tyson.

A comprehensive list of 2D shapes and 3D solids with everything from a triangle to a dodecahedron. Includes illustrations and short descriptions of attributes for each.

Explains what interpolation and extrapolation are and methods used for them in statistics. Gives real-world examples of their applications in telecommunications, engineering, thermodynamics etc.

Discusses the history of the discovery and study of electromagnetism, the scientists who worked on it, the basic principle, how wavelength and frequency are related, and types of electromagnetic waves.

Explains what electromagnetic energy is, the history of its discovery, some terms used when talking about it, and gives some facts about it.

Explains what density is, how it is calculated, and how the density of water fluctuates depending on various conditions.

Learn about the different animals that live in tropical and temperate grasslands and how they have adapted to their environment. Also discusses some plant adaptations.

Learn where calcium carbonate can be found and how it is used to support human health, in industry, agriculture, the environment, and in other ways.

Explains what chromatography is, some of its applications, and how it works.

Learn all about the element Silver, how it was discovered, its chemical properties, its long history, and how it is used by humans.