Learner Express Learner Express is a gallery of short video modules distilled from over 350 hours in the Annenberg Learner Collection. The science topics are useful in a STEM-based curriculum, while the math topics align with the Common Core Standards. You can quickly locate 1-5 minute videos to enhance classroom or professional learning. Indexed, annotated, and linked to related resources, Learner Express embodies the best of just-in-time learning.
Today, there are many active volcanoes
worldwide. Is there anything we can do to predict how and when
they will erupt?
As the world's population grows, more and more people are
living in potentially dangerous volcanic areas. Volcanic eruptions
continue--as they have throughout most of geologic time--posing ever-greater
threats to life and property.
Mt. Rainier looms over the Seattle/Tacoma area, endangering
a population of more than three million people. South of Mexico
City, Popocatépetl has begun to come to life again, putting
a million nearby residents at risk. Another million people
living in the Naples area are threatened by Mt. Vesuvius'
continued unrest. The need for planning is urgent.