Standards / alignment
NGSS-aligned concept: scale and patterns in the solar system.
Learning objectives
Students compare planetary distances and explain why common solar-system diagrams are not to scale.
Materials
Measuring tape, planet cards, calculator, large hallway or outdoor space.
Procedure
Choose a scale, calculate model distances, place planet markers, then discuss what surprised the class.
Assessment
Students create a short scale model explanation using two quantitative comparisons.