Plankton are micro organisms that live in water bodies such as seas and ponds. They feed on other aquatic micro organisms that make food using sunlight. An oil spill has occurred on the sea near the south of Singapore.
Which one of the following graphs shows the population of plankton in the area affected by the oil spill?
Global warming will cause
Melting of polar ice caps
More pleasant weather conditions world wide
More drastic fluctuations in weather patterns
Both (1) and (3) are correct
The table below groups some sources of pollution.
Which group causes air pollution?
I
II
III
IV
Glass panel usually appear hazy because
Water vapour settles on the tiny dust particles.
It is the property of transparent substance
The glass is old
Of chemical reactions
