52 Unit 1© 2013 Core Knowledge Foundation
“Sink or float?” said Joey. “I need a decision now!”
“Um, I guess it will sink,” Pete said.
Joey tossed the acorn in the pool. It bobbed and floated on top of the water
right next to the apple.
“Ha, ha! You lose!” Joey cried.
Joey ran into the house and got a plastic model airplane he had built.“Sink or float?” he asked.
“Sink!” said Pete.
Joey set the airplane ever so gently on the surface of the water. At first it
looked like the airplane was floating.
“Ha, ha!” said Joey. “It floats! You lose again!”
“Not so fast!” said Pete. He thumped the water with both of his feet and
made a gigantic wave. The wave went crashing over the airplane. The airplane
filled with water and began sinking.
“It sinks!” said Pete, smiling. “So I win!”
“No fair!” said Joey. “That’s cheating!”