Second Term Lesson Note for Week Two
Class : JSS 2
Subject : Basic Science
Topic : Environmental Pollution
Duration : 40 Minutes
Period : Single Period
Reference Book :
Basic Science and Technology for Junior Secondary School, Book 1.
Lagos State Unified schemes of work for Junior Secondary School, JSS 1 – 3.
Online Resources
Instructional Material :
Learning Objectives : By the end of the lesson learners will be able to :
WEEK TWO
ENVIRONMENTAL POLLUTION I
Definition of pollution
Air pollution
Soil pollution
Water pollution
Definition of pollution
Pollution is the contamination of our environment with dirty, poisonous and dangerous or hazardous substances. It is also defined as the release of waste products or materials into the environment that is harmful to life.
These dirty, poisonous and dangerous or hazardous substances are called pollutants
Types of pollution
Air pollution
Water pollution
Soil pollution
Air pollution
This is defined as the release of poisonous gases into the air (or atmosphere). Examples of air pollutants are sulphur (iv) oxide, carbon (ii) oxide, hydrogen sulphide, smoke etc.
Causes of air pollution
In many domestic and industrial processes, air pollutants are released into atmosphere. The sources of these air pollution differs so also the pollutants emitted into the atmosphere.
Pollutants
Sources
1
Sulphur dioxide
Burning of fuel
2
Carbon mono oxide
Burning of carbon in gas e.g. car exhaust, exhaust from factory chimney
3
Carbon dioxide
Exhaust from vehicles and factory
4
Hydrogen sulphide
Industrial processes like mining
5
Dust
Coal mining, quarry activities, site work, untarred roads etc.
6
Smoke
Domestic and industrial burnings, smoking of cigarettes, etc.
7
Smog
Sunlight effect on nitrogen (ii) oxide and nitrogen(iv) oxide
8
Radioactive rays
Nuclear power plants and nuclear reactions
Soil pollution
Soil pollution is the contamination of the land with poisonous materials. It is a times called land pollution. The major soil pollutants are refuse, sewage, agricultural waste.
Water pollution
Water pollution is the contamination of water bodies with poisonous substances. This is usually as a result of both domestic and industrial activities. These pollutants are
Refuse and sewage e.g. leftover food, urine, feaces, etc.
Industrial and agricultural waste e.g. chemicals, fertilizers, insecticides, etc.
Oil spillage e.g. breaking of oil pipe
Thermal or heat source
CLASSWORK 2
Define pollution
Mention 3 water pollutants and soil pollutants that you know
ASSIGNMENT 2
SECTIONA
The following are pollutants except? (a) dust (b) trees (c) carbon monoxide (d) smoke
the organization in Nigeria responsible for the protection of the environment is (a) NAFDAC (b) FEPA (c) NDLEA (d) ICPC
Which of these brings about pollution? (a) burning (b) recycling refuse (c) landfill (d) reuse refuse
The following are air pollutants except (a) dust (b) exhaust from cars (c) oil spillage (d) bush burning
Agricultural waste can cause what kind of pollution? (a) noise (b) air (c) land (d) none of the above
SECTION B
What are pollutants?
How many types of pollution do we have? Mention them