Volcano
by Dan Meyer
23
skips
skips
77
questions
questions
Act One
 1.
What is an answer you know is too high & too low?
Act Two
 2.
What information would be helpful to know?
 Teacher noteStudents may ask about terrain. Tell them for our purposes the terrain is completely flat between the volcano's base and Tarata. When the subject of rates and distances comes up, pass out a ruler and the following handout.
 FileHandout
 Teacher noteHave the students calculate how long it will take the lava to reach Pembroke before attempting Tarata. Many will divide the DISTANCE traveled in an hour by the distance to Pembroke. This is the central, and interesting misunderstanding.
The lava doesn't travel a constant DISTANCE in an hour. It travels a constant area.
So play the Pembroke video, which will confirm some students' work and disconfirm others. Then ask them to speculate why they might have gotten the wrong answer.
Then help them understand how to calculate the area of the ring.  VideoThe Pembroke Moment
Act Three
 Teacher noteBefore they calculate Tarata, make sure the students who got Pembroke wrong initially can go back and calculate it correctly.
 VideoThe Answer
 FileSample Student Work
Sequel
 3.
What could the yaxis be labeled for each of these graphs about the volcano & lava? Also, draw your own sketch about the volcano & lava.
 ImageGraphs
show 77 more questions


























Why is that volcano so round? Will people at Tarata be able to get out in time? How much lava volume is needed to fill that land?





how much lava will has covered the ground? if 1 foot thick, 2 ft, 1 yard








How long will it take the volcanic material to reach the town of Tarata?






































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