Non cooperation movement was a mass movement which was launched by Gandhi in 1920. It was a peaceful and a non-violent protest against the British government in India. 
Programmes of the Non Cooperation movement were:

• Indians were asked to relinquish their titles and resign from nominated seats in the local bodies as a mark of protest.
• People had to resign from their government jobs.
• People were asked to withdraw their children from government-controlled or aided schools and colleges.
• People had to boycott foreign goods and use only Indian-made goods.

The main aim of the Non Cooperation movement was the demand of 'Swaraj' or the self government.

A nuclear power plant produces electricity with the help of a nuclear fuel (uranium-235 or plutonium-239) through a self-sustaining fission chain reaction (nuclear reactions) that releases energy at a controlled rate.

Nuclear fission reaction is used to generate electricity in nuclear power plants. Most of the power plants use uranium 235 as fuel to produce heat.

In a nuclear power plant, the fission of nuclear fuel, uranium 235 is carried out in a steel pressure vessel of the nuclear reactor. The enriched uranium 235 rods are inserted in a core made of graphite blocks inside the reactor. This graphite is called as the moderator because it slows down the speed of neutrons for an effective nuclear fission. In between the uranium rods, boron / cadmium rods are also inserted which are called as the control rods.These rods absorb excess neutrons and controls the fission reaction. The nuclear reactor consisting of all the above ( nuclear fuel, control rods, moderator,etc.) is enclosed in a chamber having thick walls to absorb the nuclear radiations. Heavy water (or liquid sodium or carbon dioxide) is used as a coolant to transfer the heat produced in the reactor.

 The controlled fission of uranium 235 inside the reactor produces a lot of heat energy .  The coolant  is pumped into the reactor by using a pipe. The coolant absorbs the heat energy released during the nuclear reaction and this extremely hot coolant passes through the coil of a heat exchanger containing water . The water absorbs heat from the hot coolant and boils to form steam. This hot steam at high pressure is passed to a chamber having a turbine .The pressure of steam makes the turbine rotate. The shaft of the turbine is connected to a generator. When the turbine rotates,its shaft also rotates and drives the generator. The generator thus produces electricity.

The loss of soil cover due to natural agents like wind and running water is called soil erosion.

Types of Soil Erosion :
(a) Water Erosion : Water is a powerful agent of soil erosion. Following are the major types of erosion caused by water.

(i) Sheet Erosion : When the top layer of the soil is removed over a large area by the running water, it is called as sheet erosion.

(ii) Rill Erosion : This is the second stage of sheet erosion. If erosion continues unchecked for a sufficient time, (rills) or small finger-shaped grooves which are a few centimetres in depth, may develop on the landscape. Over a period of time, the fine rills increase in number and also become deeper and wider, and resemble the twigs, branches and trunk of a tree. This is called as rill erosion.

(iii) Gully Erosion : This is the third stage of sheet erosion. With further erosion of the soil, the rills may deepen and become enlarged, and are ultimately turned into gullies. The main cause of gully erosion is the removal of vegetation, particularly of trees with their widespread binding roots. Gullies cut up agricultural land and the entire area may be turned into a bad land topography. Gully erosion is also responsible for the formation of ravines.

 (b) Wind erosion : Wind is a powerful agent of erosion in arid and semi-arid lands with little rainfall. Wind can lift the valuable top soil from one area and deposits in another area. The wind erosion is very dangerous type of erosion because due to wind most of the deserts of the world are expanding.

The poem's meter is an irregular mix of iambic tetrameter and dimeter, and the rhyme scheme (which is ABA ABC BCB) suggests but departs from the rigorous pattern of Dante's terza rima.

Respiration: The process of releasing energy by the oxidation of food is known as respiration. The process of respiration involves intake of oxygenated air into the cells for breaking the food and releasing energy.
Mechanism of respiration:
i. Air is drawn into the body through the nostrils. 
ii. The air from the nasal cavity passes to the pharynx, which leads to the trachea, through a slit called glottis.
iii. The trachea runs down the neck and divides into two bronchi, which lead into the lungs and further divide into smaller bronchioles. The smallest bronchioles terminate into alveoli. 
iv. The walls of the alveoli are thin and covered by blood capillaries to facilitate the exchange of gases in the lungs.
v. In the alveoli, the exchange of gases takes place, CO₂​ from the blood is replaced with O_2​ and CO₂​ is removed out of the body.

vi. In humans, for the process of respiration, air is drawn into the lungs by the process of breathing.
When an individual inhales, the diaphragm moves down, and the chest cavity expands and the oxygen rich air is drawn into the lungs. When the individual exhales, the diaphragm relaxes and the chest cavity moves back to its relaxed position and the carbon dioxide rich air is expelled out of the body.

Formation of water soluble calcium bicarbonate
When CO2​ is passed through lime water, it turns milky due to the formation of calcium carbonate which is sinsoluble in water.
limewaterCa(OH)₂​​+CO₂​⟶milkinessCaCO_3​​+H₂​O

However, when excess of CO2​ is passed through this solution, the milkiness disappears. This is due to the formation of calcium bicarbonate which is colorless and soluble in water.
milkinessCaCO₃ ​​+H₂​O+excessCO_2​​⟶water solubleCa(HCO3​)₂

(especially of a man) bring (a child) into existence by the process of reproduction.

Solenoid is a coil of wire usually in cylindrical form that when carrying a current acts like a magnet so that a movable core is drawn into the coilwhen a current flows and that is used especially as a switch or control for a mechanical device (as a valve)

1. Attractive Property – Magnet attracts ferromagnetic materials like iron, cobalt, and nickel.
2. Repulsive Properties – Like magnetic poles repel each other and unlike magnetic poles attract each other.
3. Directive Property – A freely suspended magnet always points in a north-south direction.

A solenoid is a coil of insulated or enameled wire wound on a rod-shaped form made of solid iron, solid steel, or powdered iron. Devices of this kind can be used as electromagnets, as inductors in electronic circuits, and as miniature wireless receiving antennas.The device creates a magnetic field from electric current and uses the magnetic field to create linear motion. The solenoid simply works on the principle of “electromagnetism”. When the current flow through the coil magnetic field is generated in it, if you place a metal core inside the coil the magnetic lines of flux is concentrated on the core which increases the induction of the coil as compared to the air core.