MARKING SCHEME FOR JSS1 BASIC SCIENCE SECOND TERM EXAMINATION

SECTION A: OBJECTIVE TEST

1.(a) Pollution is the discharge of waste substances into the environment in quantities that are harmful to living organisms or the environment.

Pollution is the release of pollutants into the environment in quantities that are harmful to living organisms.

(Any one = 2 marks)

1.(b) Three types of pollution are:

(Any three at 1 mark for each = 3 marks)

1.(c) Control measures of water pollution:

Avoid oil spillage.
Stop indiscriminate dumping of wastes in water bodies.
Farmers should stop the use of gammalin 20.
The moderate use of agricultural chemicals e.g. fertilizer, herbicides
Educate the people on the danger of water pollution
Prevent the introduction of urine and feaces in rivers, streams, swimming pool, etc.

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