In order to design a machine that can do work for them, first graders are testing various materials and how they respond to the wind. Identifying various properties of the materials, they will predict which materials will make the best possible sails for a sail car.
Is the material heavy or light? Transparent or opaque? Elastic or inelastic? Smooth or bumpy? Which properties actually determine whether a sail will catch the wind? First graders are asking all these great questions before they plan and build their sail cars!
Is the material heavy or light? Transparent or opaque? Elastic or inelastic? Smooth or bumpy? Which properties actually determine whether a sail will catch the wind? First graders are asking all these great questions before they plan and build their sail cars!