Unit 9 was all about natural disasters and how humans respond to them. Maya found it fascinating — and a little scary. Her family lived in a coastal town, near a long-dormant fault line.
Two weeks later, during a drill, Maya and Leo’s system worked perfectly. Their classmates spread out, whistles blew, red signs went up. Everyone knew exactly what to do. oxford discover workbook 5 answer key unit 9
That morning, Ms. Kim had given them a challenge: Design a low-cost early warning system for a community with no internet or sirens. Unit 9 was all about natural disasters and
"We can’t rely on power," Leo said. "What about bells? Church bells, school bells — loud and simple." Two weeks later, during a drill, Maya and
Ms. Kim loved their idea. "You used critical thinking," she said. "That’s what Unit 9 is really about."