Question

Read the following passage carefully:

There is no denying the fact that since time immemorial, millions of birds all across the globe

have been moving from one place to another in search of food and shelter. Of late keen interest

has been shown by people in this phenomenon.

Thousands of clubs and societies of bird watchers have mushroomed in the west, keeping a watch

on the bird movements and trying to solve mysteries surrounding their migration.

In developed countries, such as Britain, Germany, Japan, the USA and Sweden one can see a

number of people of all age group, pensioners to school going children, moving about meadows,

forests and parks, on river banks and seashores with cameras and notebooks, jotting down the

names, sizes, colours and food habits of different birds.

The best way to know a bird is to flick through the pages of an authentic book written by some

renowned authors such as Salim Ali. Birds are generally shy and do not like human intrusion in

their territory. The best way to enjoy bird watching is through binocular.

Choose the correct answer:

5x1=5

1. The movement of birds started __________.

a) recently b) ages and ages ago c) lately

2.________ is the aim of bird watchers.

a) Noticing movements of the birds b) Finding solution to the mystery about bird migration

c) Both (a) and (b) d) searching food for birds​

Answer 1

Answer:

1.b

2.c

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Explanation:

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Answer 2

Answer:

If no external torque acts on a body, its angular velocity remains conserved. Explanation: If no external torque acts on a body, its angular velocity is not conserved but angular momentum is conserved. ... Hence the angular momentum of the heavenly body remains constant over its entire orbit.