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Saving Tomato Seeds — The Fermentation Method
por Bob
Ciência de Cultivos

Saving Carrot Seeds — The Two-Year Biennial
por Bob
Ciência de Cultivos

Saving Bean and Pea Seeds — The Easiest First Seed to Save
por Bob
Ciência de Cultivos

Overwintering Roots for Seed — Getting a Biennial Through Winter
por Bob
Ciência de Cultivos

Aryabhata's Spinning Earth — A Torch, a Ball, and Day and Night
por Astro
Idade Média

Zero and Place-Value — Build an Abacus and Count Like the World Does
por Mark
Idade Média

Projectile Motion — Launch a Ball and Measure Its Flight
por Penny
Scientific Revolution (1600–1760)

Hooke's Law — Stretch a Spring and Find Its Stiffness
por Penny
School Projects 11-15

The Pendulum — Time a Swing and Weigh Gravity
por Martin
Scientific Revolution (1600–1760)

The Sand Reckoner — Count the Grains and Tame Huge Numbers
por Mark
Antigo

Air Has Weight — The Upside-Down Glass and Torricelli's Barometer
por Penny
Scientific Revolution (1600–1760)

Boyle's Law — Squeeze a Syringe of Air
por Charlie
Scientific Revolution (1600–1760)

Magic Squares — Arrange Numbers So Every Line Adds the Same
por Mark
Antigo

The Mercator Map — Peel an Orange and See Why Flat Maps Lie
por Mark
Renaissance (1400–1600)

Snell's Law — Measure How Light Bends (Laser and Protractor)
por Penny
Scientific Revolution (1600–1760)

Trigonometry — Build a Clinometer and Measure a Tree's Height
por Mark
Antigo

Galileo's Falling Bodies — Race a Ball Down a Ramp
por Penny
Scientific Revolution (1600–1760)

Kepler's Laws — Draw a Planet's Ellipse with Two Pins and a String
por Astro
Scientific Revolution (1600–1760)

The Number e — Grow Money and Meet the Constant of Change
por Mark
Scientific Revolution (1600–1760)

The Birth of Probability — Roll the Dice and Find the Odds
por Mark
Scientific Revolution (1600–1760)

Descartes' Coordinates — Plot a Treasure Map and Draw with Numbers
por Mark
Scientific Revolution (1600–1760)

Napier's Logarithms — Build a Paper Slide Rule and Multiply by Sliding
por Mark
Scientific Revolution (1600–1760)

Newton's Method — Chase a Root Down Tangent Lines You Draw
por Mark
Scientific Revolution (1600–1760)

Pascal's Triangle — Build a Pyramid of Numbers by Adding
por Mark
Scientific Revolution (1600–1760)