New ReviewWhen 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...

New ReviewHow do people determine if something is acidic or basic? Learners make their own acid-base indicators using red cabbage and then determine the acidity and alkalinity of different substances. First, they test substances of known pH and...

New ReviewHow are chemical reactions affected by gravity? Learners explore the phenomenon of effervescence as part of the Christa's Lost Lessons series. They compare findings in an experiment on effervescence to a video of a similar experiment in...

A short video introduces the triangle that illustrates how to find any value given the other two in the density formula. Class members use the triangle to work several problems to find the mass, volume, or density of an object.

Around the world, about 2/3 of adult humans are lactose intolerant. Scholars work in small groups to discuss a few statements about lactose intolerance. Then, they watch a video on the topic and readdress each statement. Whole-class...

OSHA confirms that rules governing worker safety at nuclear power plants ranks higher than worker safety in offices. Scholars must consider safety, cost, alternatives, and other factors before recommending whether a town should build a...

Synthetic materials increase in popularity every year. Exploring Energy takes on the chemistry behind synthetic materials, including polyester. The resource opens with a video explaining the difference between natural and synthetic...

Plastic bags, laptops, and even toothpaste all contain petroleum. A lesson explains how to define fossil fuels, including petroleum, and the many uses for fossil fuels in our everyday lives. It also details why new sources need to...

Prepare scholars for micro and nanoscale investigations. A lab activity allows individuals to practice their experimental techniques while becoming to accustomed to the smaller scale of the materials. They also make decisions about the...

Chemistry and physics combine forces to benefit nanofabrications. Learners examine the process of wet etching in nanofabrication. Using corrosive substances such as lemon juice and Coca-Cola, they model the etching process. They then...

Can you disprove the law of conservation of mass? Pupils observe the teacher weigh each part of a reaction. Then, the teacher weighs the result of the reaction and everyone sees that the products do not equal the reactants. Then they...

A demonstration of elephant toothpaste hooks pupils' interest as they complete multiple experiments with colors, smells, bubbles, and more. By the end, they understand the differences between physical and chemical changes in the world...

When you don't follow the rules, bad things can happen! Kick off your next lab safety instructional activity using a resource from the K20 series. Pupils partner up to decipher MSDS for common lab chemicals, brainstorm common safety...

A messy fountain is potentially an energy experiment in disguise. Groups investigate the variables in creating a fountain from soda and Mentos. The last activity in a six-part series on energy has the class observe the fountain in terms...

Introduce your chemistry scholars to the periodic table's Goddess of Beauty! Through an interactive that highlights the transition metal vanadium, learners discover the colors produced in solution as vanadium changes oxidation state....

What do you get when you combine precipitate reactions with puzzles? Maximize the engagement in a single replacement reactions lesson by incorporating fun puzzles. Chemistry scholars observe the reaction between several sodium halides...

Young chemists love it when colorful solid products appear in a reaction vessel! Scholars discover the products that form during halide ion tests through a hands-on activity. Users go online and apply chemistry knowledge and reasoning...

Colorful chromium is captivating! Science sleuths solve a series of puzzles using an interactive resource. Individuals relate the oxidation states of chromium to the colors produced when the compound is placed in acidic or basic solutions.

Add a splash of color to your chemistry class! Science scholars discover the principles behind color through a wide variety of hands-on activities. Lessons include dyes, chromatography, and flame tests.

If most gases are invisible, how do we know so much about them? Pupils practice associating the name, formula, testing method, and outcome for four common gases using an interactive. Users build on the content of their first puzzles to...

Tackle polyatomic ions with Sudoku-like games! Nomenclature novices practice identifying the names and constituents of carbonate compounds with a series of puzzles. Scholars can use the resource online or as a worksheet, thanks to the...

When was the last time your class saw a catalyst in action? Chemistry scholars observe an activated complex during an engaging experiment. Through both color change and evolution of a gas, individuals gain insight into the...

Why is it so difficult to make two solid compounds react? Investigate the concepts of particle collisions and rate of reaction using a quick demonstration. The colorful experiment features two plain, white solids combining to form a...

How can removing water change the color of a substance? Lab partners remove the water of crystallization from hydrated copper (II) sulfate, record their observations, then rehydrate the solid. The resource is printable and contains ideas...