Measure a Changing Volcano
Measure a Changing Volcano Demonstration (Acrobat (PDF) 645kB May22 18)
This can be used as in class exercise with upper elementary to high school students. It also makes a great interactive outreach demonstration.
- Although you can use flour, corn starch, or drywall powder, these substances have more allergy and irritant potential. Thus sand is generally preferable.
- Balloon pumps to inflate the balloon (i.e. magma) are definitely preferable for public events where the presenter may need to do the demonstration multiple times. However, they are not as necessary for classrooms where the inflation may only be done once or twice.
- The "Junior Scientist" activity booklet.pdf (Acrobat (PDF) 438kB Jun15 18) can be printed and used to record the distance between stations as well as general observations.