Nutrient Cycles
Akopọ
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.
Awọn Afojusun
- 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)
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Nutrient Cycles. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Nutrient Cycles? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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