Brad is 16 years old and drives a small economy car to school. He is an A-B student and his only extracurricular activity is Boy Scouts. He would like to go to college and study biochemistry. His career goal is to work as an agricultural biochemist for an agricultural chemical company. Brad wants to work with some of his classmates to take water samples from local streams and rivers to see if they are contaminated with industrial or farm chemicals. His chemistry teacher has given him permission to use the equipment in the chemistry lab.