A
What is lava?
Liquid Rock
What is a landslide?
A river of rocks, mud, and pebbles that flows down from a mountain.
What percentage of Earth's volcanoes are on the Ring of Fire?
75%
What is the pattern of volcanoes that have formed on the coastlines around the Pacific Ocean called?
The Ring of Fire
Could a volcano pop up where we live?
Yes
What are two types of volcanoes?
Cone and shield
What type of lava does a cone volcano have?
thick and pasty
What type of lava does a shield volcano have?
thin and runny
What type of rock is created by shield volcanoes?
basalt
What type of rock is formed by cone volcanoes?
felsite
How could you tell if a volcano makes felsite or basalt?
the shape of the volcano or the color of the rocks near the volcano
Why are some volcanoes shaped differently?
They have different types of lava.
What kind of volcano is taller?
Cone
What kind of volcano is lower and flatter?
Shield
What is root wedging?
When a seed lands in a crack in the rock and grows roots that break the rock apart
What is ice wedging?
When water gets into cracks in the rock and expands when it freezes which breaks apart the rock.
Why don't mountains last forever?
The solid rock breaks apart into smaller rocks and erode
What kind of volcanoes explode or "blow their tops"?
Cone
What kind of volcanoes ooze runny lava?
Shield
Which does not cause a landslide?
steep slope, wind, rain, loose rocks
wind
What happens to a rock as it tumbles down a mountain?
It breaks into smaller pieces or gets less jagged.
Where should you go camping to avoid a landslide?
away from steep mountains
How could you protect your home from a landslide if it is at the bottom of a steep mountain?
wall, net, etc
Why might you find a lava rock far away from the Ring of Fire?
Not all volcanoes are on the Ring of Fire
What is a volcano called if it no longer erupts?
dormant or inactive