Write a short note on the importance of water for human body.

Question

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Answer

Water is important for human body in the following ways:

It helps in transporting food materials, gases, waste materials, enzymes and hormones from one part of the body to the other.
It assists in keeping the body temperature constant.
It is a medium in which a number of chemical reactions take place in the body.
It helps in the removal of wastes from the body in the form of sweat and urine.

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Name of the material	Appearance (Hard/ Soft)	Transparency (Transparent/ Transucent/ Opaque)	Floats/ Sinks in water	Soluble/ Insouble in water
-	-	-	-	-

Sad/ happy to see his healthy wheat crop ready for harvest. He harvested the crops and left it under the.
Sun/ rain to dry the stalks. To separate the seeds from the bundles of the stalk he.
Handpicked/ threshed them. After gathering the seed grains, he wanted to separate the stones and husk from it. His wife.
Winnowed/ threshed them to separate the husk and later.
Sieved/ handpicked to remove stones from it. She ground the wheat grains and.
Sieved/ filtered the flour. The wise farmer and his wife got a good price for the flour.

S.No.	Column $I$	S.No.	Column $II$
$1.$	Boat gets attracted towards the magnet.	$A.$	Boat is fitted with a magnet with the north pole towards its head.
$2.$	Boat is not affected by the magnet.	$B.$	Boat is fitted with a magnet with the south pole towards its head.
$3.$	Boat moves towards the magnet when the north pole of the magnet is brought near its head.	$C.$	Boat has a small magnet fixed along its length.
$4.$	Boat moves away from the magnet when the north pole is brought near its head.	$D.$	Boat is made of magnetic material.
$5.$	Boat floats without changing its direction.	$E.$	Boat is made of a non-magnetic material.

S.No.	Column $A$	S.No.	Column $B$
$(a)$	Handpicking	$(i)$	Conversion of water vapours into liquids.
$(b)$	Threshing	$(ii)$	Separating bran from flour.
$(c)$	Winnowing	$(iii)$	Separating larger size impurities.
$(d)$	Sieving	$(iv)$	Separating butter from milk.
$(e)$	Sedimentation	$(v)$	Conversion of water into Us vapours.
$(f)$	Evaporation	$(vi)$	Separating grains from its stalks.
$(g)$	Condensation	$(vii)$	Settling of heavier components at bottom.
$(h)$	Churning	$(viii)$	Separation by wind or by blowing air.

Made a dough.
Rolled the dough to make a chapati.
Baked the chapati on a pan.
Dried the chapati and ground it in a grinder to make powder. Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.