Mount St. Helens, October 1990, USGS photo

"What do you mean the mountain will change?" asks Kyle.

"Lava flows cause a lot of things to happen on the mountain," explains Logan.  "One effect is that the trees burn.  So do all the bushes and grass."

"Another effect is that the lava piles up.  That changes the shape of the mountain," adds Holly.


Can you think of a different effect that is caused by a lava flow?

Type your answer in the box, 
then click Done.


Beacon Learning Center