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In this activity, learners explore the human influences on the carbon cycle and examine how fossil fuels release carbon.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

In this activity on page 27, learners perform an experiment to learn about how different types of marine debris degrade and how weather and sunlight affect the rate of degradation.

In this activity, learners use simple items to construct a device for indicating air pressure changes.

In this experiment, learners examine the way oil affects bird feathers and test different cleanup methods to find out which works best.