please tell me questions 9to 12
Answers
9)Waste water can be used for :
(a) recharging the groundwater.
(b) can be used for irrigation.
treated municipal water can be used for washing cars, watering the gardens.
(d) certain pollutants in sewage water can become fertilizer for various crops
OR
(a) The water reservoir is a pond in figure (1) and underground water body in figure (2).
(b) Figure (2) has more advantage than figure (1), because the advantages of water stored in the ground are many such as :
(0 It does not evaporate.
(ii) It spreads insufficient availability of dissolved oxygen and nutrients resulted in the death of fish.
(iii) It provides moisture for vegetation over a wide area.
(iv) It is protected from contamination by animal and human wastes.
(v) It prevents breeding of insects.
10)The wind turns the blades which spins a shaft, in turn, prompt a generator to produce electricity. These blades are connected to a generator, sometimes through a gearbox and sometimes directly. In both the cases, the generator converts the mechanical energy into electrical energy
11) (@)This is because their diet is grass and plants, made up of fibre and cellulose which are hard to digest. As a result the herbivorous animals need a longer digestive track to digest their foods completely
(b)The trachea, colloquially called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs, allowing the passage of air, and so is present in almost all air-breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi.
c)
mucus is secreted along with the hydrochloric acid to protect the sensitive layers of the stomach.Hydrochloric acid is a very strong acid it can dissolve even some metals in it so to save our stomach layer getting burned off the mucus is secreted along with HCl.
