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Jesse looked doubtful. “Is there really any such thing as simple physics?” Tyrell laughed. “Sure there is. Here, take Rocco and I’ll show you something.” Placing the big macaw on Jesse’s shoulder, Tyrell led the kids into the back room. Glancing uncertainly at the bird on his shoulder, Jesse followed Gabriella. Tyrell pulled a book out of a desk drawer. “I like to read during my lunch break.” Pulling out the strip of paper he used as a bookmark, he continued, “What do you think will happen if I blow across this paper?” Gabriella looked at the book and the strip of paper. “I bet it flaps in the wind you create with your breath.” “Let’s see.” As Tyrell gently blew across the top of the paper, the kids were surprised to see the paper rise. Tyrell blew even harder and the paper came to a horizontal position and flapped until he stopped blowing. Putting the book down, Tyrell said with a smile. “And that is why Rocco, other birds, and airplanes can fly.” lift the difference in pressure between the top of a bird, or airplane, wing and the bottom, enabling flight to occur Words to Understand

The horizontal arrows show air moving over the wing. When the pressure over the wing goes down, lift is created.

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