This column discusses resources and science topics related to students in grades preK to 2. In this month's issue students study landscape surfaces to recognize changes due to human impacts or natural phenomena.

One teacher took her class on a year long earthquake expedition. The goal was to monitor the occurrences of real earthquakes during the year and mark their locations with push pins on a wall-sized world map in the hallway outside the science room. The purpose of the project was to create a detailed picture of the earthquakes that occurred…