Science
Forces & Motion
Conceptual
9–10 yrs
Air Resistance & Friction
空气阻力与摩擦力
Description
Identify the effects of air resistance, water resistance, and friction, and understand that these forces act between moving surfaces to oppose motion
Mastery Evidence
- Define air resistance, water resistance, and friction as forces that oppose motion
- Give everyday examples of each force and explain how they slow things down
- Describe how these forces depend on factors like speed, surface area, or surface texture
Assessment Prompt
Can your child explain why a parachute slows you down, why swimming is harder than walking, and why bike brakes use rubber pads?
