There are many interactions among living things and their surroundings. By completing a reading, scholars learn about the Earth, the moon, and the sun and how they relate to the solar system. They also investigate the basics of physical...

The cycle of energy is important to many different systems on Earth. Scholars use questioning and observation to investigate the differences between renewable and non-renewable resources and how they relate to global changes. They...

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses continuous spectra and line spectra using examples and charts to assist in the understanding.

This site provides an overview of elements and atoms, the building blocks of matter.

All matter is made of atoms! And atoms are made of even smaller more fundamental particles. Atoms are not shiny little rigid spheres as we depict in drawings and simulations; they're more like a squishy storm of tiny particles swirling...

A lengthy page from the Fundamentals of Physical Geography site. Energy is distinguished from matter, and the different forms of energy are identified and discussed. Four types of heat transfer (convection, advection, conduction,...

Atoms are very, very small. Atoms are so small that it is often said that there are as many atoms in a single grain of sand as there are grains of sand on all of the world's beaches - certainly a difficult thing to prove, but you get the...

A chemistry tutorial highlighting historical development of the atomic theory of matter and the periodic table of elements.

This lesson focuses on randomness; it explains that what we often think of as random is only random because we do not have the tools to make better predictions. However, true randomness does exists -- at the very foundations of matter. A...

From a chapter on Fluid Statics in a Physics textbook. This introductory section of the chapter covers the three common phases of matter, their physical properties, and how atoms are arranged in solids, liquids, and gases. Includes a...