The purpose of this lesson plan is to educate students about importance of phytoplankton in the oceans and how a changing climate (temperature) will influence their growth and function. This lesson plan will allow students to conduct their own mock experiment to analyze the impact of temperature on marine phytoplankton. Students will use the scientific method in this exercise. In doing so they will use their critical thinking skills to analyze a dataset and interpret what the results mean in relation to the big picture question. Students will collect the data, analyze by plotting in excel, and reflect.