Greenhouse effect is due to presence of
Ozone layer in the atmosphere.
Infra-red light reaching the earth
Moisture layer in the atmosphere
CO2 layer in the atmosphere
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
Which of the following graph is correctly represented?
Which one of the following is not used for disinfection of drinking water?
Chloromine
Chlorine
Ozone
Phenyl
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?
Which of the following activities is not a method to improve the environment?
Disposing of waste properly.
Reducing the use of fuels.
Producing less rubbish.
Using CFC products.
