instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: What is the term for the transfer of heat by a current? Answer: convection
answer:
Convection is the term for the transfer of heat by a current.

question:
Question: What type of creature is a scallop? Answer: mollusk
answer:
A scallop is a(n) mollusk.

question:
Question: How many major massive extinctions have been since life began on earth? Answer: five
answer:
There have been five major massive extinctions since life began on earth.