01. Life can exist only in the narrow belt.
(A) space (B) area (C) planet (D) star choice correct answer
Answers
Explanation:
How wonderful it is to watch the sky after sunset! One
would first notice one or two bright dots shining in
the sky. Soon you would see the number increasing.
You cannot count them any more. The whole sky is
filled with tiny shining objects – some are bright, others
dim. It seems as if the sky is studded with diamonds.
They all appear to be twinkling. But if you look at
them carefully you will notice that some of them do
not twinkle as others do. They simply glow without
any flicker just as the moon shines.
Along with these bright objects, you may also see
the moon on most of the days. It may, however, appear
at different times, in different shapes and at different
positions. You can see the full moon only once in about
a month’s time. It is Full moon night or Poornima. A
fortnight later, you cannot see it at all. It is a New
moon night or Amavasya. On this day, you can watch
the night sky best, provided it is a clear night.
Do you wonder why can’t we see the moon and all
those bright tiny objects during day time? It is because
the very bright light of the sun does not allow us to see
all these bright objects of the night sky.
The sun, the moon and all those objects shining in
the night sky are called celestial bodies.
Some celestial bodies are very big and hot. They
are made up of gases. They have their own heat and
light, which they emit in large amounts. These celestial
bodies are called stars. The sun is a star.
Countless twinkling stars in the night sky are
similar to the sun. But we do not feel their heat or
light, and they look so tiny because they are very very far
from us.
1
Let’s Do
You’ll need : 1 torch,
1 sheet of plain
paper, pencil and a
needle.
Step :
1. Place the torch in the centre
of the paper with its glass
front touching the paper.
2. Now draw a circle around
the torch.
3. Perforate the paper with the
needle within the circled
area.
4. Now place the perforated
circle part of the paper on
the glass front and wrap the
paper around the torch
with a rubber band.
5. Take care that the switch
of the torch is not covered.
6. In a dark room, stand at
some distance facing a
plain wall. Switch off all
other lights. Now flash the
torch light on the wall. You
will see numerous dots of
light on the wall, like stars
shine in the night.
7. Switch on all the lights in
the room. All dots of light
will be almost invisible.
8. You may now compare the
situation with what happens
to the bright objects of the
night sky after the sun rises
in the morning.
Answer:
life exist on earth only and earth is a planet
so planet is the correct answer
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