This activity demonstrates the use of a catalyst in the decomposition of hydrogen peroxide.

In this lesson, students discuss what happens to the mass of substances when they change state, conduct an experiment to investigate whether any changes of mass occur when ice melts, and design an inquiry to test their prediction about any changes of mass that may occur when water freezes.

In this lesson, students will use a spring to model different kinds of earthquake waves. Then they will build a model house designed to withstand the effects of shaking.

In this lesson, students will record vibrations using a model seismograph. Then they will analyze earthquake wave patterns on an actual seismogrpah and locate the epicenter of an earthquake using data from three seismograph stations.

In this lesson, students will plot the locations of some of the earthquakes that occurred during the 1990s on a world map. They will then locate areas of intense earthquake activity and hypothesize about the reasons for patterns in the locations of earthquakes.

In this lesson, students will observe, record, and graph the heating and cooling rates of soil and water and then relate their results to weather.

In this lesson, students will investigate what happens to air when it is heated or cooled by the surface beneath it and relate their results to weather.

In this lesson, students will use convection tubes to observe what happens when two masses of air meet and relate their observations to weather. Then they will analyze how land and sea breezes form and how tornadoes develop in the United States.

In this lesson, students will investigate how water evaporates and condenses into clouds and how air pressure affects cloud formation, then relate this information to weather on the earth. Students will also analyze weather maps and interpret data to plot the path of a hurricane.

In this lesson, students will investigate the effects of temperature and wind on ocean currents and how these currents affect the climate throughout the world.