Learn about volcanic ash and watch a visualization of the Calbuco volcano to see how ash travels around the world. 

Students observe monthly images of changing vegetation patterns, looking for seasonal changes occurring throughout 2017.

Teachers who are interested in receiving the answer key, please contact MND from your school email address at mynasadata@lists.nasa.gov.

The advance-and-retreat cycle of snow cover drastically changes the whiteness and brightness of Earth. Using these two 2017 maps created using NASA satellite data, have students review the seasonal differences of snow and ice extent.