Question 1

What is an ecosystem in the context of Cambridge Lower Secondary Science?

Accepted Answer

An ecosystem, as studied in Cambridge Lower Secondary Science, is a community of living organisms interacting with each other and their physical environment. It includes both biotic components, like plants and animals, and abiotic components, such as air, water, and minerals. Understanding ecosystems helps students learn about the balance and interdependence of life forms and their habitats.

Question 2

How do biotic and abiotic factors interact in an ecosystem?

Accepted Answer

In an ecosystem, biotic factors, which include all living organisms, interact with abiotic factors, such as sunlight, temperature, and soil, to sustain life. For example, plants (biotic) use sunlight (abiotic) for photosynthesis, which produces oxygen and food for other organisms. These interactions are crucial for maintaining the balance and health of ecosystems, a key concept in Biology for Cambridge Lower Secondary students.

Question 3

Why is biodiversity important in an ecosystem?

Accepted Answer

Biodiversity refers to the variety of life within an ecosystem. It is important because it enhances ecosystem productivity and stability. A diverse ecosystem can better withstand environmental changes and disturbances. For Cambridge Lower Secondary students, understanding biodiversity is essential as it highlights the importance of conserving different species and their habitats to maintain ecological balance.

Question 4

What roles do producers, consumers, and decomposers play in an ecosystem?

Accepted Answer

Producers, such as plants, create their own food through photosynthesis and form the base of the food chain. Consumers, like animals, depend on producers and other consumers for energy. Decomposers, including fungi and bacteria, break down dead organisms, returning nutrients to the soil. These roles are interconnected and vital for nutrient cycling, a fundamental concept in Biology for Cambridge Lower Secondary students.

Question 5

How do human activities impact ecosystems?

Accepted Answer

Human activities, such as deforestation, pollution, and urbanization, can significantly impact ecosystems by altering habitats and reducing biodiversity. These changes can disrupt the balance of ecosystems, leading to negative consequences like climate change and species extinction. Cambridge Lower Secondary Science emphasizes the importance of understanding these impacts to promote sustainable practices and environmental conservation.

Ecosystems

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