Curated OER
Extraction of Caffeine from Tea Leaves
Students conduct an experiment in which they extract the greatest number of grams of caffeine from four bags of tea. They conduct Internet research, conduct the experiment, and record their observations and data.
Curated OER
Analysis of Bleach
Students analyze and compare laundry bleaches by testing their oxidizing powers. They conduct their lab experiment, compare/contrast their results with other students' work, and complete a worksheet.
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Indicator Sponge A Discrepant Event Demonstration
Students explore the use of acid and base pH indicators. The teacher saturates an indicator sponge with congo red solution. Afterwards, the sponge is placed in a blue base solution. Students observe that the blue sponge actually turns...
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Types of Rock
In this rocks worksheet, students compare and contrast the 3 types of rocks: sedimentary, igneous, and metamorphic. Students complete 1 graphic organizer.
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Polymerization Experiments
Students study the concepts of polymerization and the function of crosslinkage. In this polymer lesson students complete a lab activity and write down their observations.
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Making Soap
Students explore what chemical indicators are and use pH paper to determine if something is alkaline or basic. In this pH lesson students manufacture their own soap.
Creative Chemistry
Finding the Percent of Iron in Lawnsand
For this percent of iron in lawnsand worksheet, 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 the mass...
Creative Chemistry
The Effect of Concentration Changes on Equilibrium
In this concentration changes and equilibrium activity, learners experiment with iron (III) ions and thiocyanate ions to observe the effects of concentration on the equilibrium of solutions. Students observe their mixtures, explain the...
Creative Chemistry
The Reaction Between Magnesium and Hydrochloric Acid
In this rate of chemical reactions worksheet, learners experiment with different concentrations and volumes of hydrochloric acid mixed with magnesium to explore the rate of chemical reactions. They measure the rates of the reactions and...
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The Physical Behavior of Matter
Young scholars distinguish between three phases of matter: solid, liquid and gas, on the molecular level. They compare and predict the relative compressibility of the three phases of matter through journal writings and drawings.
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How can we calculate the molecular weight of butane?
Students colloborate in a lab experiment. No OBJECTIVES.
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Activit #2 Matter: Is It Conserved?
Students support the law of conservation of matter with evidence. They discuss the changes observed from the burning of the candle, and the differences in mass which are observed when the same reaction is carried out in an open or...
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Chemical Elements and Compounds Crossword
For this elements worksheet, students complete a crossword puzzle by figuring out the vocabulary words associated with the 25 clues given.
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Pre-Lab Questions-Acids and Bases
In this acids and bases worksheet, students answer eight questions about acids and bases prior to doing a titration lab. They define both acids and bases and explain what a neutralization reaction is as well as a titration.
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Calculating pH
In this pH worksheet, students are given information and directions as to how to calculate the pH of solutions. They use their calculators to find the pH of given solutions and apply what they learned about identifying acids and bases.
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Extending the Acid/Base Concept
In this acid and base worksheet, students answer 4 questions about the definitions of acids and bases. They illustrate the differences between Arrhenius and Bronsted acids and bases and draw Lewis diagrams for the formation of compounds...
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First Land Plants Found on Earth
In this first land plants worksheet, students read about the major events that allowed plants to evolve on Earth. Students read about the primary and secondary atmospheres, the formation of the ozone layer to protect from UV light and...
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Coloring Fabrics With Dyes from Plant Materials K-12 Experiments & Background Information
Students investigate the effects of acid and bases on dyes made with plant materials. In this chromatography lesson students predict color outcomes and complete a lab activity on color combinations.
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Crystal Growing
Young scholars explore the different phases of a crystal. In this mineral lesson students grow their own sugar crystals using a sugar recipe.
Curated OER
Paint Property Experiments
Students identify various kinds of paints by using the scientific method. In this solvents lesson students collect data and identify paint samples while working in teams.
Creative Chemistry
Acids, Alkalis and Indicators
In this pH instructional activity, learners describe acids and alkalis. They also determine whether substances are strongly acidic or alkaline. To determine the pH of given substances, learners use the color of universal indicator paper....
Creative Chemistry
Energy Changes in Reactions
For this chemical bonds learning exercise, learners determine how much energy is needed to break bonds. Students classify reactions as exothermic or endothermic and identify a reaction as reversible. This learning exercise has four...
Creative Chemistry
Rates of Reaction: Indigestion Remedies
In this reactions learning exercise, high schoolers compare the reaction of two different indigestion tablets with dilute hydrochloric acid and plot the mass loss results against time. Then, they complete five short answer questions.
Creative Chemistry
D-Block Ions as Catalysts
In this catalysts worksheet, learners use transition metal ions to catalyze oxidation reactions of iodide ions. Students measure the rate of the reactions by measuring free iodine as a product.
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