Podcast
Questions and Answers
Blind Indus dolphin is endemic to river ______. It is an endangered species of water animal in Pakistan.
Blind Indus dolphin is endemic to river ______. It is an endangered species of water animal in Pakistan.
Indus
The Indus River Dolphin is listed by the IUCN as ______ on their Red List of Threatened species.
The Indus River Dolphin is listed by the IUCN as ______ on their Red List of Threatened species.
endangered
Control illegal hunting over night ______.
Control illegal hunting over night ______.
netting
Most of the islands of Maldives are less than one meter above the ______ level.
Most of the islands of Maldives are less than one meter above the ______ level.
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Ice will melt on the mountains due to global ______.
Ice will melt on the mountains due to global ______.
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The addition of harmful substances in the environment is called ______.
The addition of harmful substances in the environment is called ______.
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The shift on clean energy sources will help reduce ______ pollution and reverse its effect on the environment.
The shift on clean energy sources will help reduce ______ pollution and reverse its effect on the environment.
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[Blank] from urban areas is a major pollution causing substance.
[Blank] from urban areas is a major pollution causing substance.
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Plants and animals maintain the health of an ______.
Plants and animals maintain the health of an ______.
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When a species becomes ______, it is a sign that the ecosystem is out of balance.
When a species becomes ______, it is a sign that the ecosystem is out of balance.
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Study Notes
General Science Notes for 8th Class (For Islamabad)
Unit 1: Ecology
Control of Pollution
- Pollution is the addition of harmful substances in the environment
- Unjustified use of resources has damaged the environment drastically
- Major pollution causing substances include:
- Harmful gases and dust from factories
- Pollutants from power stations and automobiles
- Sewage from urban areas
- Use of plastics
- Air and water pollution has badly affected all forms of life
- Conservation efforts can help conserve endangered species
Control of Air Pollution
- Shift to clean energy sources can reduce air pollution and reverse its effect on the environment
- Use of wind power stations and solar energy is replacing coal and oil power stations
- Electrical vehicles are becoming popular day by day
Control of Water Pollution
- Protection of clean water resources is a challenge
- Water conservation, treatment of sewage from homes and industry, and less use of plastic can control water pollution
- This will make more clean water available to keep the ecosystem flourishing
Conservation of Endangered Species
- Plants and animals maintain the health of an ecosystem
- When a species becomes endangered, it is a sign that the ecosystem is out of balance
- Governments, NGOs, local communities, and individuals work together to conserve endangered species
- Awareness campaigns can get more people involved in conservation work
Endangered Species: Pangolin
Blind Indus Dolphin
- Blind Indus dolphin is endemic to river Indus and cannot survive in sea water
- Factors leading to its threat of extinction include:
- Pollution of river water by human activities
- Scarcity of feeding material
- The Indus River Dolphin is listed as endangered on the IUCN Red List of Threatened species
- Only about 1100 Indus River Dolphin exist in the world
Conservation of Indus Dolphin
- Steps to help conservation include:
- Starting a Dolphin Rescue Program
- Controlling illegal hunting and over-night netting
- Controlling the use of poisonous pesticides
- Rescuing dolphins trapped in shallow water
- Protecting dolphin habitats
Global Warming
- Global warming can cause ice to melt on mountains, increasing sea levels and threatening islands less than one meter above sea level
- Ways to save coastal cities from flooding or being submerged include:
- Combating global warming
- Reducing the production of CO2
- Making more dams
- Growing more trees
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Description
Learn about ecology, pollution, and its effects on the environment. Explore the causes of pollution, including factory waste, power stations, and sewage. Understand the impact of pollution on air and water quality.
