eruption

definition: 
An act or instance of erupting
sentence: 
Most of Mars' surface was shaped later by meteorite impacts, volcanic eruptions and erosion by dust and wind. This record has been obscured on the Earth by billions of years of rain, wind, erosion, volcanic eruptions, mountain building, and plate tectonics.
difficulty: 
very easy
toefl frequency: 
3
toefl classification: 
adverb: 
adjective: 
adverb sentence: 
adjective sentence: 
verb: 
erupt
verb sentence: 
Possible evidence for this theory concerns the brown ridges that mark the moon's terrain, thought to be caused by instant freezing of liquid water erupting from beneath the ice crust.