Volcanoes
Solid Rock
Landslides
100
Most of the volcanoes are along the coast surrounding the Pacific Ocean.
Where are most of the volcanoes in the world?
100
As the rocks tumble down the mountain the edges become more rounded.
Why do rocks at the bottom of a mountain tend to be rounder than the ones at the top?
100
Landslides are made of rocks or soil that slide down a slope.
What are landslides?
200
They are made from runny lava that spreads out widely.
Why are some volcanoes shaped like a shield?
200
No, mountains start as solid rock but the rock breaks into smaller pieces and the pieces roll down the mountain.
Do mountains last forever?
200
Landslides can happen when there is loose rock on a slope of more than 35 degrees and if there has been a lot of rain.
What causes landslides?
300
Volcanoes with thick lava trap the gas which makes the volcano explode.
Why do some volcanoes explode more wildly?
300
Seeds and water can enter cracks in the rock. As roots grow and the water freezes, the crack gets wider and the rock breaks.
How does solid rock break into smaller pieces?
300
Look to see if there is a lot of loose rock, if the slope is greater than 35 degrees and there has been or will be a lot of rain.
How can you figure out if it's a safe place to camp?
M
e
n
u