Mind-Blowing

"Wow, look at that wind!" Jacob said as he watched his kite fly through the air. "It's

a perfect kite-flying day!"

"Yeah," said his friend Asher, gripping the spool of his kite tightly. "I can barely hang on to mine!"

When the boys finally decided they were hungry for lunch, they reeled in their kites and got ready to leave. "This was fun--I love windy days!" Asher said. "I wonder what causes wind."

"I don't know exactly," said Jacob. "I've looked it up online, and I asked my brother about it too--he's in college and is majoring in science. It has something to do with high-pressure cells of air and low-pressure cells and collisions of air masses--all that kind of stuff. It's pretty mind-blowing," he said, grinning at Asher.

Asher laughed at the joke. "Thanks, Einstein. I still don't understand it, but I figured you would since you like science so much."

Jacob shook his head. "I don't understand it all that well. I still don't get why some days there's not enough air moving to ca