We use basic units of measurement to break down things and communicate clearly. The first lesson in an 11-part series teaches the proper way to measure various items. It starts simply with measuring the dimensions and areas of geometric...

Dry ice is extremely cold — it is -109.3°F or -78.5°C. Scholars observe and explain the molecular motion associated with melting. Then they design their own experiments to speed up the melting process. Finally, a teacher presents a...

The National Chemistry Olympiad exams are comprehensive tests covering an entire  year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your general...

College-level or AP chemists use phthalic anhydride to synthesize two different polyesters, one linear and one cross-linked in structure. A detailed materials list and well-written procedures are provided on a lab sheet. Learners write...

The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to...

First grade scientists learn about changes in the state of matter, but here is a presentation that explains it at a high school level. Illuminating graphics and photos enhance understanding, and the information is disclosed in an order...

A micro-unit on the phase changes of water includes three laboratory activities. Junior scientists compare the densities of ice and water, and then they do the same for cold and warm water. They examine freezing and boiling temperatures....

Here is a copy of a past national challenge exam that you can use in your general chemistry course as a unit or semester review. Sixty multiple-choice questions query learners on properties of matter, stoichiometry, reactions, and...

This PowerPoint is a gem! Seventy-eight slides present an entire introduction to matter in bullet-point fashion. Viewers learn about everything from mass and inertia to phase changes and gas laws! The only glitch is that the links to...

High school chemists chart the properties of different types of solids after considering their various intermolecular forces. They examine ionic and metallic bonding and draw electron dot structures for several different compounds. This...

Characteristics of each state of matter are listed, the formulas for heating water are detailed, and values for boiling and heat of vaporization are presented. This simple slide show provides direct instruction as well as practice...

How do liquids change into solids? Learners differentiate between endothermic and exothermic changes and see how those relate to changes within states of matter. In addition, individuals take a look at vapor pressure, boiling and melting...

When did the chemical change occur? Learners explore the differences between the physical and the chemical as part of the Chemistry PowerPoints series. They differentiate between extensive versus intensive properties, physical versus...

So many of the man-made products in the world are made of polymers. An inquiry-based lesson has learners explore the properties of polymers in a laboratory environment. They collect data on physical properties such as melting point,...

Read on if engineering interests you. Instructors peruse a set of narrative STEM lessons for grades K-6. All activities are based on reading a children's book and then solving a problem using the engineering design process.

In search of an organic lab that employs real-life techniques and analysis methods? Groups carry out the nitration of methyl benzoate, then attempt to determine the number and location of the nitro groups added to the benzene ring....

Immerse your chemistry class in the world of organic chemistry! Science scholars isolate acetaminophen from an over-the-counter sample during an intense and interesting lab. Groups use many different separation and analysis techniques to...

Chemistry calculations can look a bit like alphabet soup at times. How do you help pupils make sense of it all? An interactive resource helps scholars sort through the symbols for common quantities such as moles, boiling point, and...

Can a solid's melting point be lowered without placing it in an aqueous solution? Discover the surprising truth when chemistry scholars combine hydroxybenzene and menthol crystals during a microscale experiment. A well-written procedure...

What are alloys, and why do we use them? Through a series of interactive puzzles, scholars examine the components and uses of several common alloys. The accompanying teacher's resources provide support in using the lesson, printable...

What do aspirin and the willow tree have in common? Scholars of chemical synthesis engage in a fascinating reaction to make their own aspirin samples. The lab uses thin layer chromatography analysis, includes stoichiometric calculations,...

A glacier is like a river of ice. An interesting lesson explores how solid glaciers manage to flow. The video instructor explains how the pressure of the weight of the ice decreases the melting point, allowing the glacier to move.