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As a model of acid rain, learners water plants with three different solutions: water only, vinegar only, vinegar-water mixture.

In this design-based activity, learners explore environments, ecosystems, energy flow and organism interactions by creating a model biodome. Learners become engineers who create model ecosystems.

In this classic activity, learners investigate natural selection by becoming birds foraging for food on an island.

Many people get water from a source deep underground, called groundwater.

In this activity, learners explore sensors and focus specifically on how to measure humidity using a sensor.

In this activity, learners conduct an experiment to investigate the effect of elevated levels on CO2 on plant growth.