Vidyaarthee

  Let's see the definition of venation first. Venation is the arrangement of veins in leaves. One main or primary vein is present with secondary other veins. There are two types of vein arrangements that can be seen in leaves such as parallel and reticulate venation. In parallel venation, veins are parallel and do not form a complex network. Such an example is corn leaves (maize). And in the irregular venation, veins are distributed irregularly to form a complex network. Such an example is the carrot. The root of a plant is a part that is underground. There are five types of roots such as tap root, fibrous root, adventitious root, tuberous root, and creeping roots. Now let's see what the relation between venation and root is. It has been observed that plants that have fibrous roots will have parallel venation and when the plant has a tap root, the plant has reticulate or irregular venation that forms a complex network which is the answer to our question.

  Burning of Magnesium Brief Description: When a piece of magnesium ribbon is ignited, light and heat are produced. Purpose/Goal: A quick demonstration which illustrates the concept of an exothermic reaction, as well as one that produces light energy. Explanation of Experiment: The oxidation or combustion of magnesium in air has long been used as a source of intense light in photography and for other photochemical reactions. The energy released in this combustion occurs as the magnesium reacts with oxygen in the air according to the equation: 2 Mg (s) + O2 (g) → 2 MgO (s) The heat of formation of magnesium oxide is -601.83 kJ/mol. When magnesium burns, approximately 10% of the energy of combustion occurs as light, a value unapproached among known transformations of energy used in the production of light. Materials Preparation: 6-8 cm magnesium ribbon sanded to remove oxide coating Bunsen burner, charcoal grill lighter or similar Tongs Presentation: Light the burner and adjust the f...