Water Pollution
Muhtasari
Water is the universal solvent, which is exactly why it is so easily polluted. Almost anything we spill, flush or wash away ends up dissolved or suspended in a river, lake or sea. A single careless factory outfall can poison a fishery; a field of fertiliser can suffocate a whole lake; untreated sewage can spark an outbreak of deadly disease. Clean water is precious, and keeping it clean is one of the central problems of environmental management.
In this lesson you will learn where water pollution comes from, how it harms both people and ecosystems, and what can be done about it. You will follow the sinister chain of eutrophication, see how toxic chemicals build up inside living things and magnify up a food chain, and weigh the strategies, from better sanitation to tough laws, that keep our water fit to use.
Malengo
- 3.2.1 Describe the sources of water pollution, limited to: (a) domestic waste (b) sewage (c) plastic waste (d) industrial processes (e) agricultural practices.
- 3.2.2 Describe and explain the impacts of water pollution on people and on the environment, limited to: (a) risk of infectious bacterial diseases: cholera (b) accumulation of toxic substances from industrial processes (c) bioaccumulation of toxic substances in a single organism over time (d) biomagnification of toxic substances as they increase in concentration as they are passed up a food chain (e) the effect of acid rain on organisms in rivers and lakes (f) leaching and nutrient enrichment from organic content and inorganic ions leading to eutrophication.
- 3.2.3 Describe strategies for improving water quality, limited to: (a) improved sanitation (b) treatment of sewage (c) pollution control and legislation.
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Water Pollution. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which of these is a source of water pollution from agriculture? A. industrial outfalls B. fertiliser run-off C. sewage D. plastic bottles Answer: B
- During eutrophication, the dissolved oxygen in the water is used up mainly by: A. algae photosynthesising B. fish breathing C. bacteria decomposing dead algae D. plants growing Answer: C
- The build-up of a toxic substance inside a single organism over time is called: A. biomagnification B. bioaccumulation C. eutrophication D. leaching Answer: B
- Which strategy most directly keeps human waste separate from drinking water? A. controlled burning B. improved sanitation C. desalination D. chlorination of the sea Answer: B
- Acid rain that pollutes rivers is mainly caused by: A. fertiliser run-off B. sewage C. gases from burning fossil fuels D. plastic waste Answer: C
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
Biogeochemical Cycles
Discuss the biogeochemical cycles of water, carbon, nitrogen, phosphorus, and sulfur
"Biology: Biogeochemical Cycles" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/46-3-biogeochemical-cycles. Access for free at https://openstax.org/books/biology/pages/1-introduction
Vimechapishwa na mashirika mengine chini ya leseni huria na vinatajwa kama wanavyoomba. Viungo hufungua tovuti zao.
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Water Pollution? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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