We have all heard that trees help to clean the air and cool the
Earth, but how much difference does one tree make? In this workshop
for teachers, we present an activity for 5th through 8th grade
students that enables them to ``weigh'' a tree to estimate how much
it cools our planet.
Be logical! Use LED lights, logic gates, and other electronic
components to experience the true meaning of the words AND, OR, NOT,
and other logical connectors.