Paheli and Boojho have to cover different distances to reach
their school but they take the same time to reach the school.
What can you say about their speed?
Boojho walks to his school which is at a distance of 3 km from
his home in 30 minutes. On reaching he finds that the school
is closed and comes back by a bicycle with his friend and
reaches home in 20 minutes. His average speed in km/h is
(a) 8.3
(b) 7.2
(c) 5
(d) 3.6
The correct symbol to represent the speed of an object is
(a) 5 m/s
(b) 5 mp
(c) 5 m/s-1
(d) 5 s/m
A bus travels 54 km in 90 minutes. The speed of the bus is
(a) 0.6 m/s
(b) 10 m/s
(c) 5.4 m/s
(d) 3.6 m/s
Which of the following cannot be used for measurement of
time?
(a) A leaking tap.
(b) Simple pendulum.
(c) Shadow of an object during the day.
(d) Blinking of eyes.
Fill in the blanks with correct terms.
The male and female gametes fuse to form a _____(a)______
during the process of _____(b)______. This grows into an
_____(c)______ which is enclosed within a seed. After fertilisation
the ovules develop into _____(d)______ and the ovary develops
into a _____(e)______ .
Coconut is a large and heavy fruit. How is it adapted for
dispersal by water?
When you keep food items like bread and fruits outside for a
long time especially during the rainy season, you will observe
a cottony growth on them.
(a) What is this growth called?
(b) How does the growth take place?
One morning as Paheli strolled in her garden she noticed many
small plants which were not there a week ago. She wondered
where they had come from as nobody had planted them there.
Explain the reason for the growth of these plants.
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