NCERT Book Class 6 English (A Pact with the Sun) Chapter 6 The Wonder Called Sleep

• Our body and brain recover from fatigue after a good sleep.
• We dream while sleeping, but we do not always remember
our dreams.
• During sleep, our heartbeat becomes slower and our temperature
and blood pressure go down.

WE know enough about what sleep is, though we don’t know
what exactly causes sleep. Sleep is a state of rest — an
unconscious rest. When we sleep, our body recovers from
fatigue caused by the day’s activities. After a good sleep and
the rest that it gives, we
become alert and active
again, ready for the normal
activities of the day.
When we wake up in
the morning, it is not
always possible for us to
remember what hap-
pened when we were
asleep. We may remember
a dream but the rest of
our sleep was a kind of
darkness in which
nothing seems to have
taken place.