1. Topic: Pollution
Sub-topic: Water Pollution
Subject: Social Studies
Grade: 8M
Teacher: Ms.Hudson
Date: November 27, 2014
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2. What is pollution?
• Pollution is the contamination of air,
soil, or water by the discharge of
harmful substances.
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3. What is Water Pollution?
Throwing garbage in
rivers, sea and oceans
Improper sewage
disposal in ground
water
Oil spills by ships
Ships letting out
warm water bodies
Ships letting out
warm water bodies
Factory waste into
nearby rivers
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4. Definition of water pollution
• Water pollution is the contamination of
water bodies.
• Examples of water bodies are: lakes,
rivers, oceans, aquifers and
groundwater)
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5. Causes of water pollution
• Surface Water Pollution - Dumping of garbage in
rivers, lakes, oceans and seas by humans
• Chemical Pollution -Insecticides being washed
away into water bodies
• Ships letting out unwanted oil at sea. (petrol and
disel)
• Chemical waste from factories in water bodies.
• Farmers washing out their farms and its water
leading to water bodies. (Fertilizers and sewage)
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6. Causes of water Pollution
• Thermal pollution is a sudden increase or
decrease in temperature of a natural water
body..
• Cleaning of land can cause erosion into the
rivers.
• Sewage generated from homes or run off
from septic tanks into nearby rivers
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7. Effects of water Pollution
• Oil spills wiping away aquatic animals
• Sewage being washed away into water bodies
• Toxic chemicals killing fauna and flora animals.
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8. Effects of water pollution
• Contamination of drinking water
• Increase in water born diseases such as
cholera, malaria caused by mosquitoes ,
ringworm caused by dirty water
• Humans being infected with gastroenteritis,
diarrhea and vomiting.
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9. Methods To prevent Water
Pollution
• Educating the public about its harmful effects
to human and the environment
• Environmental laws
• Do not dispose of household chemicals or
cleaning agents down the sink or toilet.
• Reuse, recycle and reduce.
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10. Activity Time !!!!
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11. Question 1
• 1. What is Water Pollution?
• A. Contamination of water bodies
• B. Contamination of the atmosphere
• C. Improper Sewage disposal on land
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12. Question 2
2. How humans contribute to water pollution?
A. Oil spills in water bodies, Factory waste,
improper sewage disposal in near by rivers.
B. Spraying of chemicals on plants
C. Oil spills, factory waste and throwing garbage
on land.
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13. Question 3
• 3. What are some effects of water pollution on
humans?
• A. Cancer, Ringworm , Ebola, vomitting
• B. Cholera, Chick V. And Ebola
• C. Ringworm, cholera, Malaria and Diarrhea
and contamination of drinking water
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14. Question 4
• How water pollution affect aquatic animals?
• A. Fish lose their lives, destruction of coral
reefs
• B. Fish can still survive and reproduce
• C. The water becomes dirty and discoloured
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15. Question 5.
• 4. What methods can be practiced to reduce
water pollution?
• A. Reuse, recycle, reduce, Education and
environmental laws
• B. Proper garbage disposal
• C. Environmental laws
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16. Individual work
• Create a brochure or poster on what is
pollution , two causes of water pollution and
two methods that can be done to prevent
your select causes of water pollution
• Write a journal entry on how you feel about
Today’s lesson