AHSEC| CLASS 11| ENVIRONMENTAL EDUCATION| SOLVED PAPER - 2024| H.S.1ST YEAR

AHSEC| CLASS 11| ENVIRONMENTAL EDUCATION| SOLVED PAPER - 2024| H.S.1ST YEAR

2024

ENVIRONMENTAL EDUCATION

Full Marks: 40

Pass Marks: 12

The figures in the margin indicate full marks for the questions

 

1. (a) Answer in short (any five): 1x5=5

(i) Define genetic diversity

Ans:- It is the variation in genetic structure among individuals of a population or species, which is important for adapting to a changing environment.

(ii) Write the full form of SDRF.

Ans:- State Disaster Response Fund.

(iii) What is food chain?

Ans:- A chain of organisms where each organism is a food source for the next, showing energy transfer from one trophic level to another.

(iv) Write the name of a National Park of Assam.

Ans:- Kaziranga National Park.

(v) What is ecosystem?

Ans:- Community of living and non-living components interacting in a specific environment.

(vi) Which day is observed as the 'World Environment Day'?

Ans:- Observed on 5 June.

(vii) What is the solid mantle of the Earth?

Ans:- Lithosphere.

(b) Fill in the blanks (any three): 1x3=3

(i) Ozone is found in the stratosphere of atmosphere.

(ii) Diarrhea is a water-borne disease.

(iii) Loktak Lake is situated in Manipur.

(iv) Frog is a secondary level consumer of ecosystem.

(v) Mandatory road signs are generally triangular in shaped.

2. Write short accounts on (any five): 2x5=10

(a) Food web

Ans:- A food web is a complex network of interconnected food chains that shows the flow of energy and nutrients through an ecosystem. It shows feeding relationships between different species, including producers, consumers and decomposers. Unlike a food chain, which shows a linear path of energy transfer, a food web shows multiple interactions between organisms at different trophic levels, providing a holistic view of ecological relationships and ecosystem dynamics.

(b) Climate change

Ans:- Climate change refers to significant long-term changes in global temperature and weather patterns. It is primarily driven by human activities such as burning fossil fuels, deforestation and industrial processes, which increase greenhouse gases in the atmosphere. Climate change leads to rising sea levels, more extreme weather events and ecosystem disruption, affecting biodiversity and human societies worldwide. Urgent global action is needed through sustainable practices and renewable energy to mitigate its impacts.


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