How Nature Works in Harmony Class 8 Fill in the Blanks
hardHow Nature Works in Harmony Class 8 Fill in the Blanks
How Nature Works in Harmony Class 8 Fill in the Blanks
Question 1.
Human-made ecosystems, such as fish ponds and farms, require ............ and management to thrive.
Answer:
care
Question 2.
The period known as the ............ Revolution in India was marked by the increased use of tractors, synthetic fertilisers, and pesticides to boost food production.
Answer:
Green
Question 3.
Overusing synthetic chemicals in farming can lead to ............ degradation, which negatively impacts soil health.
Answer:
soil
Question 4.
In an ecosystem, the first trophic level is occupied by ............ , which are organisms that produce their own food.
Answer:
producers
Question 5.
A food chain illustrates the feeding relationships among organisms, showing a sequence of who eats ............ ?
Answer:
whom
How Nature Works in Harmony Class 8 True or False
Question 1.
Human-made ecosystems can help reduce pollution and support biodiversity.
Answer:
True
Question 2.
The Green Revolution in India was characterised by a decrease in the use of synthetic fertilisers and pesticides.
Answer:
False
Question 3.
Decomposers are essential for recycling nutrients in an ecosystem.
Answer:
True
Question 4.
All organisms in a food chain are classified as producers, consumers, or decomposers.
Answer:
False
Question 5.
Ecosystems can be either terrestrial or aquatic.
Answer:
True
How Nature Works in Harmony Class 8 Match the Following
Question 1.
Match the trophic levels given in Column A with the organism given in Column B.
Trophic Levels:
| Column A (Trophic Levels) | Column B (Organism) |
| (i) Producers | (a) Grasshopper |
| (ii) Primary consumers | (b) Fox |
| (iii) Secondary consumers | (c) Grass |
| (iv) Tertiary consumers | (d) Eagle |
Answer:
| Column A (Trophic Levels) | Column B (Organism) |
| (i) Producers | (c) Grass |
| (ii) Primary consumers | (a) Grasshopper |
| (iii) Secondary consumers | (b) Fox |
| (iv) Tertiary consumers | (d) Eagle |
Question 2.
Match the items given in Column A with those given in Column B.
Human Impact on Ecosystems:
| Column A | Column B |
| (i) Green Revolution | (a) Fish ponds and parks |
| (ii) Sustainable Farming | (b) Practices to reduce environmental damage |
| (iii) Wildlife Corridors | (c) Increased food production methods |
| (iv) Artificial Ecosystems | (d) Safe movement for wildlife |
Answer:
| Column A | Column B |
| (i) Green Revolution | (c) Increased food production methods |
| (ii) Sustainable Farming | (b) Practices to reduce environmental damage |
| (iii) Wildlife Corridors | (d) Safe movement for wildlife |
| (iv) Artificial Ecosystems | (a) Fish ponds and parks |
Question 3.
Match the organism given in Column A with the trophic levels given in Column B.
Organisms in a Grassland Ecosystem:
| Column A (Organism) | Column B (Trophic levels) |
| (i) Grass | (a) Tertiary consumer |
| (ii) Frog | (b) Producer |
| (iii) Snake | (c) Secondary consumer |
| (iv) Eagle | (d) Primary consumer |
Answer:
| Column A (Organism) | Column B (Trophic levels) |
| (i) Grass | (b) Producer |
| (ii) Frog | (d) Primary consumer |
| (iii) Snake | (c) Secondary consumer |
| (iv) Eagle | (a) Tertiary consumer |