Students explain the implications of particle theory of The Law of Conservation of Matter for problems of pollution and waste disposal. They describe, in terms of atoms and molecules, what happens to materials when they are dissolved or...

Students examine acceptable levels of toxins in swimming areas. Working in groups of four, students dilute a salt or sugar solution to 1 part per 1,000,000 (ppm) solution. Students taste test their diluted liquids and record at which...

Students test pH of water before and after it travels through different substrates (igneous pebbles and limestone) to detemine how soluble materials can affect groundwater. They answer questions such as: What happended to the pH of the...

Students study the water quality of a stream in their area, by measuring the temperature, pH, alkalinity and conductivity. They integrate biology with earth science when using the microscope to study the living organisms in the water.

Fourth graders discuss density.  In this floating golf ball lesson students complete a lab activity on density while working in groups. 

Students experiment to determine the positive and negative impacts of human activities on environmental change. They examine how physical and biological processes such as decomposition affect soil characteristics while looking at the pH...

Learners explore DNA and restriction enzymes using fragments of DNA separated by electrophoresis on an agarose gel. They analyze the results to see "whodunit".

Young scholars conduct an experiment to demonstrate that many of the enzyme systems needed to break down society's wastes exist in nature among the decomposers in a compost pile. They culture compost bacteria on starch agar to examine...

Students demonstrate that many of the enzyme systems needed to break down--and therefore clean up-society's wastes already exist in nature among the decomposers. They select the best starch-munching organisms by altering the environment...

Learners examine the work of scientists and determine how they test their theories.

Students predict which types of soils would work best for keeping contaminants contained. They comprehend that in the past, landfills have been one major source of groundwater contamination. Pupils comprehend that placing and building...

Learners investigate various chemical reactions when creating mixtures in ziplock baggies. In this chemistry instructional activity, students will recognize various chemical reactions and cite evidence. Safety and assessment strategies...

In this salts and buffers activity, students answer five questions about the acids and bases that form salts as well as the equations for a buffer system.

Students explore the conditions under which hydrates form. They use the Internet to access information and conduct experiments to examine how the greenhouse effect works.

Explore osmosis through art. Learners use paper towels and markers to create beautiful designs. Although a simple activity, the results are quite remarkable. Your class will love this lesson!

If you have elodea and snails in your classroom aquarium, or if you have access to a pond with these organisms, your young biologists can set up a controlled experiment to determine how certain ecosystems respond in light and dark...

In this qualitative analysis worksheet, students read about all the different tests that can be done in chemistry to give qualitative results. Tests include flame tests, forming precipitates with sodium hydroxide, using sodium hydroxide...

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...

In this halogen chemistry learning exercise, students complete a practical to gain experience observing inorganic halogens and their salts. They observe changes in each chemical reaction and write the chemical equation for each experiment.

Students evaluate data related to population growth, along with problems and soultions: disease cvontrol. They are able to explain how changes in habitat may affect organisms. Students evaluate evolutionary theories and processes.

In this equilibrium learning exercise, students answer thirty multiple choice problems including topics such as pH, analyzing titration curves, calculating molar concentrations and working with equilibrium constants.

Students identify substances that are acids and alkalis. In this acids and alkalis lesson, students conduct tests to determine if given substances are acids or alkalis. They test substances and explain the different qualities that make...

Student observe and quantify the respiration that occurs in yeast-molasses cultures. They complete an effective experiment in order to examine how to think critically about the results.

Students participate in an experiment in which they try to stop algae from growing. In groups, they develop a hypothesis and test it while making changes to the experiment along the way. They make observations and organize their data...