Mcgraw Hill Ryerson Science 9 Pdf ✦ Premium

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. ”

If you’d like, here’s a short, original story instead, inspired by a Grade 9 science class using that very textbook:

“It’s been doing that since I touched the power supply,” Kaitlyn whispered.

“You two are actually good at this,” she said. mcgraw hill ryerson science 9 pdf

Leo rubbed the balloon furiously against his hoodie, then pressed it to the wall. It stuck. “Science win,” he said.

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.”

“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 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.”

“So the broken wire is making an unstable magnetic field,” Kaitlyn said, her voice steadier now. Maya read aloud: “ Current in a wire

Maya tapped the cover of the textbook. “Blame McGraw Hill Ryerson. Page 298.”

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.