In this activity, learners work in pairs to measure each other's ankles with lengths of string. Learners make measurements both before and after lying on their backs with their feet in the air for 1 minute. This simulates the microgravity of space, where everything--including body fluids--floats! This activity station is part of a sequence of stations that can be set up to help learners explore how space affects the human body and why.


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