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In this activity, learners discuss the different salinities of oceans, rivers and estuaries.

In this activity, learners make a barometer, an instrument to measure change in air pressure.

Learners build models to learn about the special cells and structures that plants use to move water from their roots up through the stems and leaves.

In this small-group activity, learners assume the roles of pilots, air traffic controllers, and NASA scientists to solve five Air Traffic Control (ATC) problems.

In this water pollution activity, learners create pond water cultures and investigate the effects of adding chemicals or natural nutrients.

Did you know that the water we use today is the same water found on Earth millions of years ago? The Earth constantly uses and recycles water in a process called the water cycle.

In this activity (page 26 of the PDF), learners make observations, formulate hypotheses and design a controlled experiment, based on the reaction of carbon dioxide with calcium hydroxide.

In this multi-station lab, learners conduct a series of experiments to explore the processes and effects of weathering and erosion.