gases

Learn about the air around you, and find out about oxygen, the atmosphere, gases, and pollution.

The states of matter (solids, liquids, and gases) are explained and demonstrated. Includes an experiment to try.

Introduces properties of nonmetals, including carbon, hydrogen, and other gases.

A simple introduction to gases, including what they are, how they mix and travel, bubbles, and air pollution.

See how and why substances such as water change from one state to another. Learn the role of atoms and the factors that cause matter to change form. Hands-on activity.

Explains the different states of matter and how a substance changes from one to another; and includes experiments and activities.

Introduces the basic forms of matter: solid, liquid and gas and how matter can change from one form to another. The terms melting point, freezing point and boiling point are clearly explained. Includes a hands-on activity that demonstrates how different liquids evaporate at different rates.

Discusses the nature, constitution, properties, and behavior of matter in its various solid, liquid, and gaseous forms. With hands-on activities.

There are more than 1,500 active volcanoes around the world. Most of Earth's active volcanoes are found in a region called the Ring of Fire.

An introduction to the states of matter, focusing on gas, explaining what it is and how it behaves, and looking at the oxygen cycle.