(i) Defusing Bomb.
(ii) Finding survivors in unstable rains, and exploring mines and shipwrecks.

(i) Top - down approach.
(ii) Bottom - up approach.

Nano science is the science of objects with typical sizes of 1-100 nm. Nano means One - billionth of a meter that is 10^-9 m.

Industrial robots are used for welding, cutting, robotic water jet cutting, robotic laser cutting, lifting, sorting, bending, manufacturing, assembling, packing, transport, handling hazardous materials like nuclear waste, weaponry, laboratory research, mass production of consumer and industrial goods.

(i) Higgs particles' also known as "God" particles were discovered and for this, Peter Higgs and Englert received noble prize in physics.
(ii) It is the 'Higgs particle' which gives mass to many particles like protons, neutrons etc.

(I) In 1954, George Devol invented the first digitally operated programmable robot called Unimate. George Devol and Joseph Engelberger, the father of the modern robotics industry formed the world's first robot company in 1956.
(ii) In 1961, Unimate, was operated in a General Motors automobile factory for moving car parts around in New Jersey.

The natural structure provides a blueprint for creating ultra-durable synthetic materials that could be useful for mechanical components in electronics, and in other devices that undergo repetitive movement, abrasion and contact stress.

Manipulation of colours by adjusting the size of nano particles with which the materials are made.

Nanotechnology is a technology involving the design, production, characterization, and applications of nano structured materials.

Black holes are end stage of stars whose mass ranges from 20 times to 1 million times the mass of the sun. Because of their dense mass, they have very strong gravitational force such that no particle or even light can escape from it. Therefore they are not visible to human eye. Every galaxy has black hole at its center. 

Robots are automated machines which have many mechanical parts like wheels, arms, fingers, legs etc. Therefore a strong material is needed. For a given size, steel has several times stronger.

Advantages of Robotics:
(i) Robots are more precise and error free in performing the task.
(ii) Robots never get tired like humans. It can work for 24 x 7. Hence absenteeism in work place can be reduced.
Disadvantages of Robotics:
(i) Unemployment problem will increase.
(ii) Robots can perform defined tasks and cannot handle unexpected situations.

(i) The scales on the wings of a morpho butterfly.
(ii) Peacock feathers.

(i) If the particle of a solid is of size less than 100 nm, it is said to be a nano solid, if the particle size exceeds 100 nm, it is a bulk solid.
(ii) Both have same chemical properties. But their mechanical, electrical, optical, magnetic properties differ.

(i) Nano science is the science of objects with typical sizes of 1 - 100 nm. It deals with the study of property change when a matter is divided into nano particles.
(ii) Nanotechnology is a technology involving the design, production, characterisation and applications of nano structured materials.