This USGS activity leads students to an understanding of what remote sensing means and how researchers use it to study changes to the Earth’s surface, such as deforestation. 

Students will describe the changes in a newly-formed volcanic island over the first three years of its life.  

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

Compare pictures of different volcanoes. Then visit NASA's Space Place to learn about volcanoes and answer questions about volcanic eruptions.