Soalan Ekosistem Sains Tingkatan 2

| No. | Answer | | :--- | :--- | | (1) | - An individual is a single living organism, like one tree or one bird. | | (2) | C - The sun is the main source of energy that plants use to make food. | | (3) | C - A group of the same species (zebras) in a specific area at the same time is a population. | | (4) | C - Rice fields are man-made, unlike oceans, ponds, or deserts which are natural. | | (5) | B - Sunlight is a non-living component; the others are living organisms. | | (6) | B - About 90% of energy is lost as heat, so only 10% moves up the food chain. | | (7) | C - Decomposers break down dead matter, recycling nutrients back into the soil. | | (8) | C - This is parasitism, where the tick benefits and the dog is harmed. | | (9) | C - Foxes depend on rabbits for food, so without rabbits, the fox population would likely decrease. | | (10) | B - A food web is a more realistic representation of feeding connections, showing how food chains overlap. |

Ekosistem adalah suatu sistem yang terdiri daripada komuniti organisma hidup (biotik) dan komponen bukan hidup (abiotik) yang berinteraksi di dalam suatu lingkungan tertentu. Ekosistem dapat dijumpai di darat, air, atau udara, dan dapat berbeza-beza saiznya, dari ekosistem kecil seperti kolam kecil hingga ekosistem besar seperti hutan hujan. soalan ekosistem sains tingkatan 2

a) Bina satu rantai makanan daripada jadual di atas. (1 markah) b) Ramalkan apa yang akan berlaku kepada populasi udang kecil jika semua ikan kecil mati akibat pencemaran. Berikan sebab. (3 markah) | | (3) | C - A group

: Apabila bilangan pemangsa (burung hantu) berkurang, kadar kematian mangsa (tikus) akan menurun, menyebabkan populasi tikus membiak dengan cepat tanpa kawalan. Jawapan Bahagian B (Subjektif) Jawapan Soalan 1 (a) Komuniti →right arrow | | (6) | B - About 90%

Pelajar Tingkatan 2 perlu memahami:

b) Apa yang berlaku jika populasi burung menurun secara drastik? a) Rumput.

Jelaskan kesan penebangan hutan secara tidak terkawal terhadap ekosistem setempat. Jawapan: Habitat haiwan musnah menyebabkan kepupusan spesies.