Final answer:
Convenience sampling is the method used when the first ten people to show up for class are asked to fill out a form, as it involves choosing those who are easily available.
Step-by-step explanation:
The sampling method described by 'The first ten people who show up for class are asked to fill out a form' is known as convenience sampling. This method involves selecting individuals who are conveniently available to participate in the study, which does not involve random selection from the entire population. Convenience sampling is used when the ease and speed of data collection are priorities, but it may not provide a representative sample of the population being studied.