A student enjoys candies. While walking home from the store a student put a pack of candy-coated chocolates in his pockets. When he reached his home, he decided to enjoy the candies. However, when he pulled them out of his pocket, they were melted. He wondered what caused the candies to melt and decided to investigate further. The student asked the question, “How does heat affect the coating on candy-coated chocolates?” He purchased several types of candies to test, including candy-coated chocolates, chocolate candy-coated almonds, chocolate candy-coated peanuts, and chocolate candy-coated peanut butter. He estimated the distance from the store to his house (about 15 minutes). He decided walk around his house with a pack of chocolates in his pockets for 15 minutes at a time while completing his daily tasks. He did this every day for one pack of chocolates at a time. Each day when the 15 minutes were done, he observed the chocolates to see if they melted. All of the following are true about this experiment except ___.

This seems like a controlled experiment because one variable is changed.

There doesn’t seem to be a consistent set of conditions for the experiment to be completed.

There doesn’t seem to be a control group in this experiment.

More than one variable has been changed in this experiment.