Beyond Benign
Daphnia Bioassay LD50
De-icing materials may have a harmful effect on our environment; have your class perform an experiment to test the nature of these effects. Scholars monitor the survival rate of a sample of daphnia as the concentration of a de-icing...
Curated OER
How Strong is the Solution
Young scholars investigate the strength of solutions. In this scientific inquiry lesson plan, students examine various solutions of food color and water as they discover the concentration of the solutions by adding bleach to clear the...
Curated OER
Making a Miniature Concrete Girder
In this concrete girder worksheet, students use water, sand, cement and gravel to construct concrete girders. Students vary the proportions of the mixtures and label each concrete girder with the mixture's components.
Curated OER
The Synthesis of Some Organic Compounds And Their Representative Structures
Students examine how to represent organic compounds three-dimensionally. They write a synthesis reaction for three demonstrations, and construct a three-dimensional structure using a molecular modeling set.
Curated OER
Activity #19 Oxygen For Yeast
Pupils observe and record what occurs when yeast is added to hydrogen peroxide. They indicate why a chemical reaction (decompostion) must have occurred during the experiement. Pupils explain why yeast was used. Students comprehend the...
American Chemical Society
Combustion and Burning
On Earth, a candle flame points up, but on the International Space Station, it forms a sphere. Young scientists practice their skills by recording observations before, during, and after a candle burns. Chemical and physical...
Cornell University
Discovering Enzymes
Explore the function of enzymes through a series of lab investigations. Learners use household enzymes such as hydrogen peroxide to model the role of enzymes. The enzymes break down proteins with and without a catalyst.
Curated OER
Heat of Vaporization of Liquid Nitrogen
Young scholars determine the heat energy needed to vaporize (boil) one gram of liquid nitrogen.
Curated OER
Activity #7 Special Properties: A Discussion
Students identify special properties of matter (absorbency, hardness, brittleness, malleability, and elasticity). They define the term matter. Pupils investigate some of the special properties of matter to aid in classifying matter.
Curated OER
Experiment on Measuring Reaction Rates
Learners investigate the rate of a chemical reaction. In this rate of reactions lesson plan, students use an electronic balance to measure the change in mass of a chemical reaction between hydrochloric acid and calcium carbonate. They...