Chem4kids
Chem4 Kids: Helium
Here you can find lots of great information about helium. Learn about its electrons, where it exists in nature, and about the element itself!
Khan Academy
Khan Academy: Ideal Gases in Medicine
This passage tests your knowledge on the kinetic molecular theory of gases using the five-question quiz.
Other
The Elements: Noble Gases
A listing of the noble gasses can be found here as well as images and links to additional information. This site is maintained by a high school chemistry teacher but is supplemented with information from the Los Alamos National...
CK-12 Foundation
Ck 12: Chemistry: Noble Gases
[Free Registration/Login may be required to access all resource tools.] Covers electronic configuration of noble gases and the reactivity of noble gases.
Other
Virtual Chembook: Density Applications With Gases
DENSITY is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume. For...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Balloons & Buoyancy
Experiment with a helium balloon, a hot air balloon, or a rigid sphere filled with different gases. Discover what makes some balloons float and others sink.
Georgia State University
Georgia State University: Hyper Physics: Speed of Sound
Physics tutorial on measuring the speed of sound in dry air. An interactive form allows the student to practice solving problems involving the temperature dependence of the speed of sound.