Which event was responsible for supplying the early earth with water?
a. tectonic movement
b. glacial advances
c. volcanic eruptions
d. earthquake activity

In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations

Match the mountains with the type of collision that formed them. a. andes b. aleutians c. north american cordillera d. appalachians 1. continental- continental 2. continental- oceanic 3. oceanic- oceanic 4. arc- continent

In plate tectonics, why is the north american plate tectonically inactive?