Question

Sometimes it's hard to tell if the bowl-shaped feature at the top of a volcano is a crater or a caldera. You can usually determine if it's one or the other by _____.
learning its size and how it formed
learning how much water it is filled with
learning what type of volcano it's on top of
learning if the volcano is active or extinct

Answer 1

Good Morning!
 
learning its size and how it formed

The difference between craters and calderas is in the formation mode of each of them. Craters generally are more circular and smaller, and result from the projection of gas and magma, while calderas arise from falling stones and rocks.