Classes 7-10
Total 30 question
Question 25
Yogesh takes a magnetic compass in the lab and tries to show how it works to his friends. But, it does not
work well in the laboratory. It just swings to and forth. He then takes it out in the field and it started
working. What do you think could be the possible reasons for this?
UNIT 8: GREEN INVADERS
The residents of Nanganallur and Adambakkam wanted to revive an environment park on
AdambakkamEri. The lake needs to be desilted and deepened and a bund is to be formed for a walkers'
path. Moreover, steps are to be taken to prevent the discharge of sewage through storm water drains and
the dumping of garbage on the lake bunds. The environmentalists say that invasiye
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