This is a fun activity the teacher can use when talking about natural disasters (particularly earthquakes) and how they lead to the formation of landforms. This is a cool, engaging activity (involving food) that would be appropriate for students of many ages.
Pictures of the year 2010: earthquakes, volcanoes and environmental disasters
A cavernous and almost perfectly round sinkhole swallowed an entire intersection in Guatemala City during a tropical storm. The hole is 66 feet across and plunges nearly 100 feet down. Geologists said that the circular shape suggested a cave formation underneath, but what exactly caused the sinkhole was still a mystery