Holding the other end of the twine, count your strides to measure the length for the redwood. Once you reach 65 meters, have a friend stand in that spot. Follow the same directions to measure the length of your tree. Imagine your tree next to a giant redwood as you compare the two lengths of twine. Identify the trees you have graphed.
Trees send water through their trunks and out their leaves.
Fill two cups with the same amount of water, mark the water levels, and tape paper covers over the cups' tops. Take two twigs, removing the leaves from one. Place one twig in each cup, poking the stems through the covers. Wrap a plastic bag around a few leaves to catch the moisture. Water comes up through the tree's trunk and out to the leaves.