Question

1 Fill in the blanks.
(a) A sundial uses the
of a tall object
to tell time.
(b) The device used to measure time is known
as a
(c) There are
seconds in an hour.
(d)
clock is the most accurate clock.
(e) Small time intervals are measured by a
2. Name two phenomena in nature which repeat at
regular time intervals.​

Answer 1

Answer:

Answer For Option B C D And E

Explanation:

B.Watch

C.3600

D.Digital

E.Stopwatch

Answer 2

Answer:

a) gnomon

b) clock

c) 60 sec

d) atomic clock

2. Moon and all celestial objects revolves in a periodic manner with a definite time period. There are lot of examples in day to day life that are periodic in nature. Seasons, Weather are all periodic phenomenon of nature and apart from this even the beating of our heart is periodic .