Understanding Physical and Chemical Parameters of Ocean Water Using CTD Profiles
Overview
A focus of the PolarTREC Southern Ocean Diatoms expedition was to collect water samples and physical profile data using oceanographic technology. Oceanographers rely on the real-time data transferred from the water column to the ship-based computers using a CTD sensor. The CTD measures conductivity (salinity), temperature and depth
This lesson includes a variety of research activities and a lab that all help demonstrate the science behind convection currents.
Objectives
Through the following activities and lab students will discover:
* that temperature and salinity affect the density of fluids (liquids and gases)
* how fluids with different densities interact with each other
Students will use guidance from the Project Budburst website (http://neoninc.org/budburst/index.php) to make observations and keep records on trees found on the school grounds. While this lesson applies to more temperate locations, similar work is undertaken in the Arctic to monitor changes in the timing of plant phenology. Major phenological events (first leaf, first flower, leaf fall, etc) will
Students will explain, both orally and in writing, a diagram used to illustrate a food web.
Objectives
Students will learn how language is used to communicate and is required to impart knowledge and sustain a healthy, traditional community in a modern world.
Students will learn strategies for communicating complex ideas to an audience.
Students discover how different organisms that live in the Arctic depend on each other and what might happen to the food web if one or more organisms disappears from it. Students will build an arctic food web.
Objectives
Students will learn that organisms are part of a global food web and linked to each other and their
Students will use marshmallows to simulate toxins in the environment. Concentrations of these toxins will be modeled and calculated as they bioaccumulate up the food chain. Methylmercury and POPs are substances that bioaccumulate in the Arctic food chain. OASIS scientists studied these in Barrow, Alaska. (See Ocean Atmosphere Sea Ice and Snow (OASIS) Project at www.polartrec.com)
Students will discover how a simple action such as turning on a television will lead to toxins in our food supply. Many of these toxins concentrate in the Arctic because of long-range transport of pollutants in the atmosphere. Scientists in the OASIS project (http://www.polartrec.com/ocean-atmosphere-sea-ice-and-snowpack-interactions) study these pollutants in the Arctic. Students will learn about actions that they can take to