One way scientists talk about matter or substance-that is, the stuff in the world-is in terms of pure substances and mixtures. Pure substances are substances that contain only one kind of molecule. Water with nothing else in it is a pure...

Often we find that different phases of pure substances can exist in equilibrium with one another. Let us consider an important gedankenexperiment (Latin-German for "thought experiment") in which we boil water. Ordinary water boiling is...

This series of activities focuses on the separation of mixtures. The activities can be used in a unit on mixtures and pure substances.

An outline on the topics of pure substances and mixtures.

Defines matter, substances, and mixtures and gives examples.

An inquiry lab where students try to separate as much as the pure substance they can in a set time period. This lab helps students understand that physical means can be used to take apart a mixture.

As part of a larger resource called "Getting started in Chemistry," this page examines various topics related to the study of matter. Included in the study are properties of matter, classification of matter, pure substances, chemical...

Given descriptions, scenarios, or illustrations of properties, students will distinguish between pure substances and mixtures.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial students will define a mixture and understand why mixtures are different than pure substances. They will classify mixtures as homogeneous or...

Textbook-like exposition of pure chemical substances and mixtures.

Learn about the classification of matter based on whether the chemical composition is pure or a mixture. Understand the definitions of elements, compounds, substances, and mixtures, and what the differences are between them. Five types...

This lesson focuses on different types of chemical substances, distinguishing between pure substances and mixtures, and changes of temperature based in substance. It provides a link to a test.

A laboratory experiment where students classify matter into a homogenous mixture, heterogeneous mixture, solution, or pure substance. Also students will test for physical and chemical changes.

[Free Registration/Login may be required to access all resource tools.] In this online tutorial, students will begin to understand a substance according to its physical properties. Learn to distinguish between extensive and intensive...

Learn how substances change from a liquid to a gaseous state in the process of evaporation.

[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will use the oxidation number rules to determine the oxidation number of an atom of any element in a pure substance. They...

This hands-on activity will help the students have a better understanding of different types of materials as pure substances and mixtures and distinguishes the homogeneous and heterogeneous mixtures by discussing some material they use...

[Free Registration/Login may be required to access all resource tools.] Students will use the physical and chemical properties of matter to categorize the various forms of matter.

This Study Card stack enables students to review the concepts of matter, the kinds and classes of mater including atoms, molecules, elements, compounds, pure substance, and mixtures.

[Free Registration/Login may be required to access all resource tools.] Explores elements and their different properties, the history of elements, and how atoms relate to elements.

A collection of lesson plans for helping students understand atomic composition. Site uses work samples, phenomena, assessment templates, and videos to plan lessons to describe the atomic composition of simple molecules.

[Free Registration/Login may be required to access all resource tools.] Discusses elements and their different properties, the history of elements, and how atoms relate to elements.

A module reviewing over how vaporization occurs and its difference from evaporation. Also, review over the definition of boiling point. Module includes a video, pictures, explanation, and review questions.

In this lesson, students are introduced to the 5 major types of chemical reactions. Each reaction type will be analyzed and specific examples will be noted. Students will then perform a lab investigation which includes each of the...