Xylem and phloem tissues make up the “circulatory” system of a plant. The xylem tissues transport water from the roots to all of the other living tissues, while the phloem tissues transport sugars from the green tissues where photosynthesis occurs to non-green tissues such as flowers, seeds, and roots. Transpiration is the loss of water through open stomata in the leaf and the large leaf veins. This demonstration allows students to see the xylem tissues and observe the direction of the water flow. The pale colour of Napa cabbage makes it ideal for observation.
Related Resources:
Student Activity: Using a Mariner's Astrolabe
Categories: Lab/Student Activity
An astrolabe illustrates how the sky looks at any given time of day and throughout the year. This is accomplished by drawing the sky (star patterns) on the astrolabe with moveable parts to adjust for... read more
Safe ON Science Second Edition
Categories: General Interest, Teacher Demonstration
SOS is a collection of best practices to promote safety in high school science. View Safe On Science Second Edition in your browser. . read more
Teacher Demo: Potato Candle
Categories: Teacher Demonstration
In this demonstration, a peeled potato is cut into the form of a candle and an almond slice is used as the candle’s “wick.” The teacher lights the almond slice on fire and it burns. The... read more