Students test for the presence of enzymes in fruit and the specificity of those enzymes, as well as to identify and show the susceptibility of enzymes to certain environmental factors (temperature and pH) originating in the enzyme's...

Students develop a comprehension of parts per million as a concept. They work in teams to create successive dilutions of a solution to reach a parts-per-million concentration. Students list what they think the atmosphere is made of. They...

Students examine solubility and the significance of water.  In this aqueous solution activity students complete a lab activity on soil profiles.

Students study the concept of ice energy. In this ice energy lesson, students observe what happens when salt is sprinkled on a piece of ice before following a recipe to make two types of ice cream. They note the difference in the two...

Students observe the chemical reaction that occurs when salt is put on ice, and use the energy that is released to make ice cream.

Young scholars investigate how salt affects the state of ice. In this ice cream making instructional activity, students change the freezing temperature by adding salt and observing the results. Young scholars use experimentation and...

Students are introduced to the principles of gel electrophoresis. They practice loading gels and pipetting. In this laboratory activity, food color is separated into constituent pigments. The lab can be run with standard electrophoresis...

In this thermometric titration activity, learners investigate the temperature changes when an acid neutralizes an alkali. High schoolers graph their results from the titration and draw the two best-fit lines on their graph. Where the...

Young scholars perform an experiment to determine which source of gas (their breath, exhaust from a car, or the air in the classroom) has a greater concentration of carbon dioxide. Students compare the colors of BTB solutions after...

Students covert ethanol to ethanoic acid using a condenser for this oxidation reaction worksheet. They test the smell of the final product, add sodium carbonate, and test the product with indicator paper. They explain their observations...

In this concentration changes and equilibrium worksheet, learners experiment with iron (III) ions and thiocyanate ions to observe the effects of concentration on the equilibrium of solutions. High schoolers observe their mixtures,...

Students study various aspects of air. For this science lesson plan, students discover that air occupies space, understand the visual effects of air, and explain how air exerts force.

For this percent of iron in lawnsand learning exercise, learners perform a titration of lawnsand using potassium manganate(VII) solution and determine the number of moles of iron in the sample. Students use the number of moles to find...

In this acids and bases learning exercise, students identify the strengths of acids and  bases and indicate the concentration of hydronium and hydroxide ions. They determine if given chemical formulas are acids or bases,...

Students make slime. In this chemical reaction lesson, student use Borax to make a gel like solution. Students add all ingredients listed, add food coloring, and mix well. Students see first hand how  chemicals react together and...

For this preparation of triiodomethane learning exercise, students use propanone to prepare triiodomethane. Students use filtration and recrystallization to produce the product. They determine the melting point using a melting point...

In this thermometric titration learning exercise, learners titrate hydrochloric acid with sodium hydroxide to determine its concentration. They measured the solution's change in temperature, plotted their data, and used the graph to find...

Students explore the components of matter. They discover what matter is, the states of matter, and how heat and cold cause it to change states in an online format. In addition, they complete internet-based lessons, activities, and quizzes.

Middle schoolers investigate the pigments in Magic Markers using chromatography. In this paper chromatography lesson plan, students use absorbent paper and mark the strip with a Magic Marker. They place the strip in a solvent and observe...

In this complex salt worksheet, learners create teraamminecopper(II) sulfate · 1 · 2H₂O using copper(II) sulfate, concentrated ammonia, and ethanol. Students determine the formula mass for their product, the theoretical yield of the...

In this diffusion through a membrane instructional activity, learners fill in the blanks to complete 27 statements about cell membranes, the movement of molecules across the cell membrane, concentration gradients and diffusion.

Students discover how rocks are created.  In this rock formation lesson, students investigate saturation, evaporation, and phase changes in geology.  Students create rock candy from skewers, string, boiling water and sugar.

In this thermometric titration worksheet, students determine the concentrations of hydrochloric acid and ethanoic acid using a titration where they measure the temperature of the solution as it is titrated. The equivalence point is found...

Students conduct a series of experiments to observe factors that impact molecular movement. In this molecular chemistry lesson, students drop food coloring in water with different properties (hot, with ice, with alcohol) and observe how...