Now it becomes crystal clear why the unit is called Mixtures and Solutions. The fifth installment of a six-part unit explores mixtures and solutions. After viewing a demonstration on mixing pebbles with water, salt with water, and...

Why does some ink bleed through paper, and other ink doesn't? Practice some paper chromatography to separate the colors from a pen with an interactive experiment for middle and high schoolers. Learners use a variety of solutions to track...

When making sweet tea, why do people dissolve the sugar in hot tea instead of cold tea? The class discusses the previous lab and builds upon it. Working in groups, they design an experiment to determine how temperature affects the...

Individuals explore solubility by modeling how water dissolves salts. They then view a video and compare how well water and alcohol dissolve salts, relating their comparisons to the structure of each molecule. 

From molecules to nanotubes, an engaging unit explores the world of tiny science. Fifteen hands-on experiments and lessons engage young scientists as they learn chemistry. Discussions, worksheets, and data analysis reinforce the concepts...

Students design experiments examining the effects of various solutes on water. They record results on graphs explaining any unexpected consequences of their experiments and determine if their hypotheses were correct.

Students make dilutions using dulution trays. They keep track of their dilutions and the concentrations of solute, to parts per million (ppm) and parts per billion (ppb), in order to have an comprehension of the terms. Students make...

Students read the story, "Police in Schools". They view a list of common offences committed by young people and identify the victims of these offences and consider how the offence would affect those people.

Students test factors that may affect the rate at which sugar dissolve in water. They conduct two studies: One is to test the effect of temperature on the rate of solvation and the other is to test a factor which Students come up with...

Students measure and graph the absorbance of light by chlorophyll at a specific wavelength versus chlorophyll concentration. They are given an unknown and determine its concentration from their calibration curve. Students become familiar...

High schoolers explain the basic concepts of polymerization. Students participate in a lab to create a crude preparation of carboxyl esterase and test its effectiveness in reducing the residual monomer in an emulsion such as paint.

Eighth graders analyze questions posted on a large poster in the room and work in groups to record their response to the question on paper, rotating to the next question after two minutes have passed. They review the characteristics of...

Students experiment with Thin Layer Chromatography to separate pigments found in flower petals.