Which+Way+Do+They+Go

= Learning Experience 2: Which Way Do They Go? = Objectives ** ¨  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 Driving Questions ** ¨  How do organisms locate the resources they need? Time requirement ** ¨  Preparation time 5-10 minutes ¨  Setting the Context  10-15 minutes ¨  Lab activity 2 class sessions 45-50 minutes each  ¨  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 || //Euglena// are single-celled, photosynthetic organisms. This is an excellent time to conceptually discuss photosynthesis and the requirements of photosynthetic organisms. ¨  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 ** ¨  Students observe how a single-celled Protist responds to sunlight o  Notes: §  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 o  Notes: §  Omit the use of the dissecting needle §  Demo adding the coverslip and proper use of the microscope Processing for Meaning ** ¨  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? Reading - Homework **  ¨  What’s Your Response? Students will read how //E. coli//, //Dictyostelium//, plants and humans respond to environmental changes.
 * Materials and Equipment**
 * //For each student or group://**
 *  ¨  //Euglena// culture
 * Background **
 * Setting the Context **