How Nature Works in Harmony Class 8 Short Question Answer

How Nature Works in Harmony Class 8 Short Question Answer

How Nature Works in Harmony Class 8 Short Question Answer

Question 1.

What are the two main components of an ecosystem?

Answer:

An ecosystem consists of biotic components (living organisms) and abiotic components (non-living elements like air, water, and soil).

Question 2.

What is a food chain, and why is it important in an ecosystem?

Answer:

A food chain is a linear sequence that shows 'who eats whom' in an ecosystem, illustrating the flow of energy and nutrients among organisms.

Question 3.

How do decomposers contribute to the health of an ecosystem?

Answer:

Decomposers break down dead organic matter, recycling nutrients back into the soil, which is essential for plant growth and maintaining ecosystem balance.

Question 4.

Why are human activities like deforestation and pollution a threat to ecosystems?

Answer:

Human activities disrupt natural habitats, leading to loss of biodiversity, habitat destruction, and changes in climate, which threaten the balance of ecosystems.

Question 5.

What is a food chain, and why is it important in an ecosystem?

Answer:

A food chain is a linear sequence that shows the feeding relationships among organisms, illustrating 'who eats whom'. It is important because it helps us understand how energy and nutrients flow through an ecosystem, maintaining balance and supporting biodiversity.

Question 6.

Describe the role of producers in a food chain.

Answer:

Producers, such as green plants, are at the first trophic level of a food chain. They convert sunlight into energy through photosynthesis, forming the base of the food chain and providing energy for all other organisms.

Question 7.

How do human-made ecosystems differ from natural ecosystems?

Answer:

Human-made ecosystems, like farms and parks, are designed and maintained by humans to meet specific needs, such as food production or recreation. In contrast, natural ecosystems develop independently and are self-sustaining, relying on natural processes.

Question 8.

What are some negative effects of using synthetic fertiliser's and pesticides in farming?

Answer:

The overuse of synthetic fertilisers and pesticides can lead to soil degradation, reduced soil fertility, and harm to human health and the environment. These practices can also disrupt natural ecosystems by affecting non-target organisms and polluting water sources.

Question 9.

What is the significance of wildlife corridors in relation to animal habitats?

Answer:

Wildlife corridors are designated pathways that allow animals, such as elephants, to move safely between fragmented habitats. They help maintain biodiversity and reduce human-wildlife conflict by providing safe routes for animals to access food and water without entering human settlements.