Learning+Experience+2+Which+Way+Do+They+Go?

= Learning Experience 2: Which Way Do They Go? = Objectives ** Driving Questions ** Time requirement ** **Materials and Equipment** ¨ 1 jar with a screw cap lid ¨ Spring water ¨ 1 sheet of black construction paper ¨ 1 eyedropper ¨ 1 microscope slide and coverslip ¨ 1 rubber band ¨ 1 scalpel or utility knife or scissors ¨ 1 sheet of cardboard as a cutting surface ¨ 1 paper towel ¨ 1 dissecting needle ¨ Compound microscope ||
 * Students identify resources that are necessary for survival
 * Students observe that organisms response to the environment
 * Students develop a hypothesis about how //Euglena// responds to changes in their environment
 * Students conduct an experiment to determine that there is a relationship between response and the requirements for maintaining life
 * How do organisms locate the resources they need?
 * Preparation time 5-10 minutes
 * Setting the Context 10-15 minutes
 * Lab activity  2 class sessions 45-50 minutes each
 * //For each student or group://**
 * ¨ //Euglena// culture

//Euglena// are single-celled, photosynthetic organisms. This is an excellent time to conceptually discuss photosynthesis and the requirements of photosynthetic organisms.
 * Background **

¨ Discuss the major resources needed for survival Pre-lab Preparation ** ¨ Prepare the //Euglena// cultures ¨ Setup the light rack Lab Safety ** ¨ Proper use of the microscope Experimenting and Investigating **
 * Setting the Context **
 * Students observe how a single-celled Protist responds to sunlight
 * Notes:
 * The type of water used in this experiment is critical. Store-bought spring water is the best.
 * Use scissors instead of a scalpel or utility knife
 * Be sure that the jar is completely covered with the construction paper
 * Be sure that the cutout portion faces the light source
 * Students will also observe the //Euglena// under the microscope
 * Notes:
 * Omit the use of the dissecting needle
 * Demo adding the coverslip and proper use of the microscope

Processing for Meaning **  Notes ** Water! Loyola tap water is too hard. Use DI water instead.
 *  Discuss results
 * Do students understand that environmental resources are essential to an organism’s survival?
 *  What other environmental factors can affect the behavior of an organism?
 * What’s Your Response?
 *  Students will read how //E. coli//, //Dictyostelium//, plants and humans respond to environmental changes. 