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Photosynthesis Explorer Demonstration To view specific sections of Product Help, click on the links below in the Table of Contents. To read Product Help in its entirety, scroll through the document manually. Product Description Return to the Photosynthesis Explorer home page In what ways do different factors effect the ability of plants to photosynthesize? The Photosynthesis Explorer simulation lets you explore this type of problem. Photosynthesis Explorer is a simulation program based on a mathematical model of the chemical processes in photosynthesis. It can be used to simulate many types of experiments related to the utilization and storage of energy by plants. In the original program, each exploration allows you to manipulate specific variables (oxygen, light intensity, air temperature, etc.) and view how the variables you adjust effect the ability of plants to photosynthesize. In this demonstration "Light" is the only exploration available. Return to the Table of Contents When you launch the program, you'll be placed in the first of two menu screens. Explore the list of choices by pressing Tab. Press spacebar to make a selection. Since this program is a demonstration, only one activity has been created: the Exploration about Light. On the opening screen, the active controls include Explorations, a button that brings you to the second menu screen, Help and Quit. When you tab to buttons for sections of the product which are not available, you will hear "inactive" at the end of the button's name. Each of the six input variables (temperature, CO2 in air, water intake rate, O2 in air, humidity and light intensity) is adjusted with a slider. To increase an input's value incrementally, press the right arrow key. To lower a value incrementally, press the left arrow key. Pressing the Page Up key increases the slider value by 10%. Pressing the Page Down key decreases the value by 10%. Press Home or End to move to the highest or lowest value, respectively. The input controls can be used even when the simulation is running. While the simulation is running, you can track two outputs, Sugar Production or Oxygen Production, separately or simultaneously. There are three output selectors that control how you track the outputs. F1 tracks sugar production, F2 tracks oxygen (O2) production and F3 tracks both outputs simultaneously. Each output has been assigned a specific voice pitch for easy tracking. Sugar production is a high pitch, and O2 is a low pitch. Menus can be activated using the keyboard. Press F10 to reach the menus. Then use the right and left arrows to scan the menu bar. Press the down arrow key to open a menu and scan its contents. Press Enter to select a menu item. Submenus can be activated similarly. Pressing Escape while in a menu will close the menus and return focus to the program. Pressing Escape while in a submenu will close the submenu and return focus to the previously active menu. General Commands:
Input Controls:
Output Controls:
Menu keys:
Speech Commands:
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TABLE OF CONTENTS | CREDITS WGBH | NCAM | CD-ROM PROJECT |