Page 23 - Mousumi

Weaver
take motors by placing wooden
sticks on the top of the motor and
place the motors in the vessels,
by switching on motors then it
rotates, one can remember the
turbines. Turbines are made up of
wood and these are used to
produce electric current
from streams, dams, rivers, etc.
 Another simple experiment with
vegetables: collect some lemons
and oranges into a bowl and now
take a knife and cut them into
two halves and peel the layer of
Oranges and press it then you
will notice that our eyes began to
release water; this is because of
acid which is present inside the
Orange peel.
 Lemons contain vitamin c and it
contains ascorbic acids.
Deficiency of vitamin c results in
scurvy.
 Children usually want to know
information about trees.
 Take a leaf, observe the colour of
the leaf, it looks green in colour.
Now place the plant from
sunlight and place it inside a
room. After one day you will
notice that the plant dies, it is
because the plants require
sunlight.
 Take another plant and keep it
outside of your room, don't pour
water to the plant. After a few
hours you will notice that the
plant gets wilted -the plant leaves
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become wilted. Here we identify
that for plants water is necessary.
 Take another plant and cut the
stem of the plant. Now you will
see some layers inside the stem,
these layers are phloem (which
transfers food to plant), xylem
(which transfers water to the
plant).
 Xylem and phloem are
collectively known as vascular
bundles of the plants.
 To find out the age of trees
calculate the annual rings of the
tree.
 When you see a large cut down
wood of a tree, then you will
notice that the wood contains few
rings and these rings are called
annual rings, these are used to
count the age of the trees.
 Uses of detergent: detergents are
used to clean our clothes and
bleaching powder is used to clean
surroundings and write the
observations.
 Preparing a new design /painting
by using tomatoes, potatoes,
powders etc.
 Children/students always want to
do some projects/experiments in
their school, for that they firstly
will do the projects/experiments
in their house.
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