Let us take the plastic ball and make the first marking.
Now let us make several markings on the ball
as shown in this image.
To do this take a thick thread and measure
the circumference of the ball by circling
the thread around the ball and
then measure the thread.
In our case circumference is 56.5cm.
Make the second marking on half the circumference
by doubling the thread.
Now let us mark the other markings by further
doubling the thread.
Carefully make all the markings as shown in
the image.
Now, let us make the linings by joining the
marks we made.
Be sure to make a D on the top of the triangle.
Under the guidance of elders cut along the
linings with the help of a blade to cut out
the triangle.
Now, carefully cut the top along the D to
preserve the north pole.
Let us now calculate the radius of the sphere.
Circumference = 2 pie Radius. C=2(3.14) R
You can also calculate radius with the help
of online calculator.
Now that our radius is approx 9 cm.
We will draw a semi circle and a quarter with help of a compass and cut it out from the cardboard.
Do some finishing and stick the three quarters
at 90 degrees with the help of tape.
This seems to be perfect.
But, to make it stay at place we will fill
the empty ball with some trash and keep it
at its place.
Also insert the spoke from North pole and
let it come out of south pole.
Place the quarter in the ball to see if it
is a perfect fit, if not fill some more trash.
Draw a circle which is 1 cm more than the
radius on a drawing sheet.
Then draw a circle which is of the size of
the radius of the ball and then divide it
into 4 quarters and cut one quarter out.
Then arbitrarily draw 4 concentric circles
which will represent the layers of inner earth.
Now quickly color the layers of earth in bright colors.
Leaving the outer 1 cm blank.
Cut the outer black circle in zig-zag fashion so that we can stick it on the ball.
Stick this paper on the cardboard and place it in the empty space on the ball and stick
it with the help of Micropore tape which has rough surface so that we can color it.
You can also label it if you like.
Now start painting the surface of the ball
with blue poster color.
After the color dries keep a map and carefully mark the continents on the ball with a pen
and then paint it white or green as you wish.
Hurray we have done it.
We have made a real globe with 3D layers of earth.
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