Nutrient Cycles
Muhtasari
The Earth is a closed box: almost no new atoms arrive from space. So every carbon atom in your body, and every nitrogen atom in your proteins, has been used before, perhaps by a dinosaur, a fern or a bacterium. Nutrient cycles are the routes these atoms take as they pass endlessly between the air, the soil, living things and back again.
In this lesson you will follow carbon through photosynthesis, respiration, feeding, decomposition, fossil fuels and combustion, and then trace nitrogen through the bacteria that fix it, turn it into nitrates and return it to the air. Understanding these cycles explains everything from why we add fertiliser to fields to why burning fossil fuels is warming the planet.
Malengo
- Describe the carbon cycle, limited to: photosynthesis, respiration, feeding, decomposition, formation of fossil fuels and combustion
- [Supplement] Describe the nitrogen cycle with reference to: decomposition of plant and animal protein to ammonium ions nitrification nitrogen fixation by lightning and bacteria absorption of nitrate ions by plants production of amino acids and proteins feeding and digestion of proteins deamination denitrification
- [Supplement] State the roles of microorganisms in the nitrogen cycle, limited to: decomposition, nitrification, nitrogen fixation and denitrification (generic names of individual bacteria, e.g. Rhizobium, are not required)
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 Nutrient Cycles. 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.
- During daylight, which process carried out by green plants takes carbon dioxide out of the air? A. respiration B. transpiration C. photosynthesis D. decomposition Answer: C
- Carbon locked in coal and oil is returned to the air mainly by: A. photosynthesis B. combustion C. nitrification D. transpiration Answer: B
- Plants absorb nitrogen from the soil in the form of: A. nitrogen gas B. ammonia gas C. nitrate ions D. protein Answer: C
- Which bacteria convert ammonium ions into nitrates? A. denitrifying bacteria B. nitrifying bacteria C. decomposer fungi D. nitrogen-fixing bacteria Answer: B
- Denitrifying bacteria are harmful to soil fertility because they: A. fix nitrogen gas B. make nitrates from ammonium C. turn nitrates into nitrogen gas D. decompose protein Answer: C
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 Nutrient Cycles? 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.
