Ratios & Proportions
Where ratios and proportions show up in real life
5 live exhibits. Each one already works. Change a number and see what happens.
Open as board Play with these together. Solving one grows related exhibits.
Ratios & ProportionsScaling a recipe: more people, same taste
Double the guests? Every ingredient grows by the same factor.
Arithmetic & Number SenseRoad trip math: miles, liters, and dollars
Convert once and the trip adds up: how far, how much fuel, how much money.
Ratios & ProportionsWire resistance: longer and thinner resist more
Resistance grows with length and shrinks with thickness. Pick the wire that keeps it low.
Linear EquationsVoltage divider: two resistors make a new voltage
The output is the input times a ratio of resistors, until you connect a load.
Exponents & LogarithmsBrightness vs. distance: the inverse-square law
Move a light twice as far and it gives a quarter of the light. Photographers call that two stops.