American Chemical Society
Middle School Chemistry: Air: It's Really There
Investigation shows that gas takes up space and has mass, and that the motion of gas molecules is affected by heating and cooling.
ClassFlow
Class Flow: Matter, Property and Changes
[Free Registration/Login Required] This flipchart contains a review quiz for high school chemistry on matter, property and changes.
Upper Canada District School Board
Tom Stretton's Advanced Placement Chemistry: Liquids and Solids
Take on this self-guided advanced level e-text, and learn about the chemical and physical structure of liquids and solids.
University of Pennsylvania
University of Pennsylvania: Solid State Chemistry: Describing Crystalline Solids
This site contains in-depth information on crystalline solids. Includes basic concepts, pictures, learning graphs, and useful tools.
Simon Fraser University
Chem1 Virtual Textbook: Collecting Gases Over Water
The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section deals with several states of matter, and specifically the relation between gas and...
Simon Fraser University
Chem1 Virtual Textbook: Densities of Substances and Materials
As part of a larger site called "Getting started in Chemistry," this site examines various topics related to the densities of substances and materials. Included in the study are properties of solids, liquids and gases, and how density is...
Other
Homewood City Schools: Classification of Matter
This Homewood City Schools site has an outline form and contains lots of information about the classification and composition of matter. Some of the topics covered are matter and temperature, changes in state, composition of matter, and...
Center of Science and Industry
Cosi Columbus: Can You Stand the Pressure
Science experiment that demonstrates the four states or phases of matter: solid, liquid, gas, and plasma. Includes full list of materials, procedures, and scientific explanation of how you change water from a liquid state to a gaseous...
CK-12 Foundation
Ck 12: Chemistry: Gases
[Free Registration/Login may be required to access all resource tools.] Properties of gases, why they exert pressure and atmospheric pressure.
American Chemical Society
Middle School Chemistry: Changing State Melting
Explore the phase change that occurs when ice is melting.
American Chemical Society
Middle School Chemistry: Moving Molecules in a Solid
Explore the movement of the molecules in a solid.
Other
States of Matter and Properties of Gases: Terms
A very complete list of terms that are important to the study of gases. This resource is a web archive.
Frostburg State University
General Chemistry Online: Heterogeneous Mixtures
This is a brief definition from Frostburg State University of a heterogeneous mixture. Includes commonly known examples of these mixtures.
CK-12 Foundation
Ck 12: Physical Science: Liquids
[Free Registration/Login may be required to access all resource tools.] Properties of liquid matter.
CK-12 Foundation
Ck 12: Physical Science: Melting
[Free Registration/Login may be required to access all resource tools.] What happens to matter when it melts and the definition of melting point.
Mocomi & Anibrain Digital Technologies
Mocomi: Molecules
When two or more atoms combine they give rise to a molecule. A molecule can be made up of many atoms of the same element. There are 112 elements known to man, so can you imagine the different permutations and combinations of molecules...
CK-12 Foundation
Ck 12: Physical Science: Solutions
[Free Registration/Login may be required to access all resource tools.] What a solution is and its different parts, definition of soluble and insoluble. Solutions in different states of matter.
CK-12 Foundation
Ck 12: Physical Science: Gases
[Free Registration/Login may be required to access all resource tools.] Discusses properties of gases, why they exert pressure, and atmospheric pressure.
CK-12 Foundation
Ck 12: Physical Science: Deposition
[Free Registration/Login may be required to access all resource tools.] Definition of deposition and examples of deposition in nature.
CK-12 Foundation
Ck 12: Physical Science: Sublimation
[Free Registration/Login may be required to access all resource tools.] Definition and an example of sublimation, and conditions under which sublimation of snow and ice occur.
CK-12 Foundation
Ck 12: Physical Science: Condensation
[Free Registration/Login may be required to access all resource tools.] Explores how condensation occurs, how it relates to dew point, and its role in the water cycle.
CK-12 Foundation
Ck 12: Physical Science: Plasma
[Free Registration/Login may be required to access all resource tools.] Properties of matter in the plasma state and where plasma is found.
Khan Academy
Khan Academy: Molarity
Learn the definitions of a solution, solute, and solvent. Understand how molarity is used to quantify the concentration of solute, and comcalculations related to molarity.