Biology - 4BI1 PearsonEdexcel

Feeding Relationships

Muhtasari

Every organism needs energy, and that energy almost always traces back to the Sun. Plants capture light energy and lock it into glucose. Herbivores eat the plants. Carnivores eat the herbivores. At every step, most of the energy is used up rather than passed on, which is why food chains rarely have more than five links.

In this lesson you will learn the names ecologists give to each feeding level, build food chains and food webs, and explore three types of ecological pyramid. You will also discover why only about 10% of energy transfers from one trophic level to the next - a fact that shapes ecosystems worldwide.

Malengo

  1. Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers
  2. Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
  3. Understand the transfer of substances and energy along a food chain
  4. Understand why only about 10% of energy is transferred from one trophic level to the next

Maelezo ya Somo

A field of wheat captures sunlight and stores it as chemical energy. A mouse eats the grain and uses most of that energy to move, keep warm and stay alive - only a fraction becomes new mouse tissue. An owl then catches the mouse, and the same pattern repeats. By the time you reach the top of a food chain, the energy available is a tiny fraction of what the producers originally captured. This progressive loss explains why top predators are rare and why ecosystems need a vast base of producers to support even a small number of apex hunters.

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.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Feeding Relationships. 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.

  1. Which trophic level contains producers? A) Level 2 B) Level 1 C) Level 3 D) Level 4 Answer: B
  2. Approximately what percentage of energy is transferred from one trophic level to the next? A) 50% B) 90% C) 10% D) 100% Answer: C
  3. Which type of ecological pyramid is always pyramid-shaped? A) Pyramid of numbers B) Pyramid of energy C) Both A and B D) Neither A nor B Answer: B
  4. In a food chain, the arrows show: A) The direction predators move B) The direction of energy transfer C) The size of organisms D) The habitat of organisms Answer: B
  5. What is the main reason energy is lost between trophic levels? A) Photosynthesis B) Respiration C) Reproduction D) Growth 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.

Maelezo kamili ya masomo yenye michoro
Msaidizi wa kujifunza wa AI
Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

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.

Maelezo kamili ya masomo yenye michoro
Msaidizi wa kujifunza wa AI
Soma bila mtandao, wakati wowote, mahali popote
Inapatikana kwa Android, Windows, macOS, na Linux

Fanya Mazoezi ya Maswali ya Majaribio

Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Feeding Relationships? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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Msaada Nje ya Mtandao - Jifunze Wakati Wowote, Popote Pale
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