Pollution
Muhtasari
Pollution is what happens when human waste enters the environment faster than it can be broken down or absorbed. Sometimes it is obvious, like oil on a beach; sometimes it is invisible, like the carbon dioxide warming the planet or the nitrates that secretly suffocate a river by feeding it too well.
In this lesson you will describe the effects of sewage, fertilisers and non-biodegradable plastics, and explain how methane and carbon dioxide drive the enhanced greenhouse effect and climate change. You will also work through eutrophication step by step, the surprising process by which adding nutrients to water ends up killing everything in it.
Malengo
- Describe the effects of untreated sewage and excess fertiliser on aquatic ecosystems
- Describe the effects of non-biodegradable plastics, in both aquatic and terrestrial ecosystems
- Describe the sources and effects of pollution of the air by methane and carbon dioxide, limited to: the enhanced greenhouse effect and climate change
- [Supplement] Explain the process of eutrophication of water, limited to: increased availability of nitrate and other ions increased growth of producers increased decomposition after death of producers increased aerobic respiration by decomposers reduction in dissolved oxygen death of organisms requiring dissolved oxygen in water
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la 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.
- Excess fertiliser entering a river first causes: A. fish to grow larger B. rapid growth of algae and water plants C. a rise in dissolved oxygen D. fewer decomposers Answer: B
- During eutrophication, the dissolved oxygen falls because: A. plants stop photosynthesising B. decomposer bacteria respire as they break down dead plants C. fish breathe too fast D. nitrates remove oxygen directly Answer: B
- Non-biodegradable plastics are a problem because they: A. are broken down too quickly B. are not broken down by decomposers C. dissolve in water D. release oxygen Answer: B
- Which pair are both greenhouse gases? A. oxygen and nitrogen B. carbon dioxide and methane C. carbon dioxide and oxygen D. methane and nitrogen Answer: B
- A major human source of methane is: A. photosynthesis B. cattle farming and wet rice fields C. burning coal only D. ocean evaporation Answer: B
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Pollution? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
Kila kitu unachohitaji ili kufaulu katika JAMB, WAEC & NECO.
