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In this activity, learners investigate the different salinity levels of oceans, rivers and estuaries.

In this activity, learners test to see if carbon dioxide is present in the air we breathe in and out by using a detector made from red cabbage.

This hands-on astronomy activity allows you to create a “cutaway” telescope to clearly show how reflector and refractor telescopes work.

When it rains, water can collect on top of and seep into the ground. Water can also run downhill, carrying soil and pollution with it.

This activity models the way Landsat satellites use a thermal infrared sensor to measure land surface temperatures.