Question

5. Answer the following :-
a) What is mastication?
b) Why do we wear woollen clothes in winter?
c) What chemical reaction takes place in the process of photosynthesis?​

Answer 1

Answer:

a) Mastication (chewing), in which food is crushed and mixed with saliva to form a bolus for swallowing, is a complex mechanism involving opening and closing of the jaw, secretion of saliva, and mixing of food with the tongue.

B) As wool is a very good insulator and a poor conductor of heat, woolen clothes keep the body warm and protect it from the cold winds. Also, the air trapped between the woolen fibers prevents the flow of heat from the body to the cold surroundings. ... Thus dark, thick, woolen garments are suitable during winter

c) The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.