When the light of a star passes through a spectrograph, elements of that star reveal a specific signature. Compare the spectra of four elements and a star to identify which elements you can detect in the star's atmospere.
Join the celebration by creating paper butterflies that will migrate to their counterparts in Mexico for the winter. Children in Mexico who live beside the monarch's winter sanctuaries send them north in the spring.
Examine how multiple light sources produce shadows of differing darkness and length. Move a player (with four light sources) around the field until your image matches the five other images on the page so you can identify where the player is on the field.