Hardware: Hardware is the parts of a computer which we can touch and feel.
Software: Software are programmed and coded applications to process the input information.

(i) Neem trees give shadow and it purifies the air in the form of oxygen.
(ii) Leaves and other waste of this plant is used as fertilizer.
(iii) Oil and cake is derived from seeds of this plants is used as natural pesticides.
(iv) Juice of its leaves are used to treat pox like disease.

i) Do not pour leftover oil, old medicines or waste down the drain or into the toilet.
ii) Reduce the use of chemical pesticides and fertilizers to grow crops.
iii) Use waste water for garden in home.
iv) Do not litter or dump waste - always use a waste bin.

Cement is manufactured by crushing of naturally occurring minerals such as lime, clay and gypsum.

(i) "To a thirsty man, a drop of water is worth more than a sack of gold".
(ii) "Water covers 2/3 of the surface of the earth. But only 0.002% is drinkable".
(iii) "Save water to secure for your future".
(iv) "Store water for dry days".
(v) "Save water, Save life".

(i) Bone provide a frame work for the body.
(ii) Bones along with muscles help in movements such as walking, running chewing and dancing, etc., 

(i) Cell is the basic structural and functional unit of every living organism.
(ii) cell is self sufficient to carryout all the fundamental and essential functions of an organism.
(iii) Without cell there is no life, So cells are called as building blocks of life.

During monsoon, the biscuits placed in open lose its crispness. Sugar in biscuits takes up water from the atmosphere and become so soft.

No. Deforestation can be an undesirable change. That is, Deforestation is harmful to our environment and not desired by us.

The molecules in the solid move faster and vibrate when heating. Spread apart and occupy more space. So solid expands when heated.

Adaptive features of polar Bear : Thick skin for protection, White fur.
Adaptive features of Penguin : Paddle to swim, walk with two legs.

(i) The atoms of a gas never stop moving.
(ii) They are not affected by gravity.
(iii) They spread out in order to occupy the available space.

Magnets lose their properties if they are heated or dropped from a height or hit with a hammer.