“Mystery objects” – a brine shrimp egg and a seed that looks similar – are placed in both salt water and soil to see which thrives in each environment.
Examine the difference in the number of revolutions for each of two gears in a model, in order to undertand the significance of the radii of the gears.
Take readings of a thermometer in a glass of ice and then in warm water. Watch the volume of the red liquid in the thermometer expand, to develop ideas about the effect of energy on the change of state of matter.
Work with models to represent the relative distance of the Moon from the Earth, then measure the angular size of the Moon with pinky fingers to check the estimate.
This introduction to exponential functions considers the world population since 1650. In a simulation, the population grows at a random yet predictable rate.
