Mcgraw — Hill Ryerson Science 9 Pdf
“It’s not working,” he grumbled.
Leo grinned. “Best field trip we never left the classroom for.”
Maya pointed to a diagram in the book. “You didn’t rub it long enough. Electrons move from your hair to the balloon. Negative charge builds up. Opposite charges attract the wall.”
Leo pointed at the frayed wire near the power supply. “That’s not supposed to spark like that.” mcgraw hill ryerson science 9 pdf
“You two are actually good at this,” she said.
“It’s been doing that since I touched the power supply,” Kaitlyn whispered.
“So the broken wire is making an unstable magnetic field,” Kaitlyn said, her voice steadier now. “It’s not working,” he grumbled
They reported the loose wire to their teacher, who thanked them and fixed the circuit before anyone got shocked. Kaitlyn smiled—a real one.
Maya flipped through her worn copy of McGraw Hill Ryerson Science 9 , searching for the section on static electricity. Outside the classroom window, rain streaked the glass. Inside, her lab partner, Leo, was trying to stick a balloon to the wall.
If you’d like, here’s a short, original story instead, inspired by a Grade 9 science class using that very textbook: “You didn’t rub it long enough
But their victory was cut short by a commotion at the back of the room. Kaitlyn, the quiet student who never spoke, stood frozen beside an open circuit board. A small compass on her desk was spinning wildly—north, south, north, south—even though no magnets were nearby.
Maya read aloud: “ Current in a wire creates a circular magnetic field. The direction of the compass needle will change if the current is alternating or unsteady. ”
Maya tapped the cover of the textbook. “Blame McGraw Hill Ryerson. Page 298.”
Maya grabbed the textbook and flipped to the electricity unit. “Electromagnetism,” she murmured. “An electric current creates a magnetic field. If the compass is moving without a magnet, there’s stray current somewhere.”
Leo rubbed the balloon furiously against his hoodie, then pressed it to the wall. It stuck. “Science win,” he said.
