Due to different kinds of phenomena, what earth do you think we have right now?
Answers
Answer:
rms and cyclones. You learnt that
cyclones can cause a lot of damage to
human life and property. You also
learnt that we can protect ourselves from
these destructive phenomena to some
extent. In this chapter we shall discuss
two other destructive natural
phenomena. These are lightning and
earthquakes. We shall also discuss what
steps we can take to minimise
destruction caused by these
phenomena.
15.1 Lightning
You might have seen sparks on a
electric pole when wires become loose.
This phenomenon is quite common
when wind is blowing and shaking the
wires. You might also have seen sparks
when a plug is loose in its socket.
Lightning is also an electric spark, but
on a huge scale.
In ancient times, people did not
understand the cause of these sparks.
They were, therefore, afraid of lightning
and thought that the wrath of gods was
visiting them. Now, of course, we
understand that lightning is caused by
the accumulation of charges in the
clouds. We need not be afraid of
lightning, but we have to take
Scientific discoveries are a
result of hardwork by many
people. It can sometimes take
a long time.
I wonder why they took so
many years to realise the
similarity.
precautions to protect ourselves from
the deadly sparks.
The Sparks that the Greeks Knew
About
The ancient Greeks knew as early as
600 B.C. that when amber (amber is a
kind of resin) was rubbed with fur, it
attracted light objects such as hair. You
might have seen that when you take
off woollen or polyester clothes, your
hair stands on end. If you take off these
clothes in the dark, you even see a
spark and hear a crackling sound. In
1752 Benjamin Franklin, an American
scientist, showed that lightning and the
spark from your clothes are essentially
the same phenomena. However, it took
2000 years for this realisation to occur.
Explanation:
i may be wrong but i hope it helps you