A  line of volcanic activity that surrounds the Pacific Ocean basin is the ____________

What is the most active volcano in the Philippines?

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash

A volcano that has erupted in recorded history is said to be

When a volcano shows no signs of life and exhibits evidence of long-term erosion, it would be classified as a(n): 

Which do not belong to the following

What is magma? 

Which type of volcano has a very broad shape with gentle slopes

Where in the world are three-quarters of the world's active volcanoes found?

What is PHIVOLCS