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NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants
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Paheli noticed water being pulled up by a motor-pump to an overhead tank of a five-storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell why?
Answer:
Roots absorb water and minerals from the soil continuously. Evaporation of water from leaves creates a suction force which causes the water to move upwards.
Video transcript
"hello everyone welcome to little
this is priya and here we have a
question about
atom so the question is if
z equal to 3 what would be the valency
of the element and also name the element
so given atomic number is
given atomic number is
atomic number is
set equal to three so when coming to the
electronic configuration of
electrons in that element are atom
if you see in the k shell it occupies
the 12
electrons and in l shell it occupies one
electron
so the valency of these
atom will be 1 so valencia of this atom
is
one because it is ready to
lose one electron and the atom will
becomes positive charge
and the element according to the atomic
number what has given
said the atomic number of atom which has
three
is a lithium
so lithium is an atom which kind of
which has an
atomic number of three so this is about
the question hope you understand this
video if you like my video please
subscribe to leader channel and if you
have any doubts you can keep a message
in comment box
thank you"
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