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Learners engage in close observation of falling objects. They determine it is the amount of air resistance, not the weight of an object, which determines how quickly an object falls.

Learners observe a flask with a balloon attached over the mouth and inverted inside the flask.

Learners make a skydiver and parachute contraption and launch it. They see that the drag created by air resistance slows the descent of skydivers as they travel back to Earth.

Learners will build a lung model to understand how their lungs and diaphragm work to make them breathe.