Here are 10 one-word answer type questions from the chapter “Forests: Our Lifeline” along with their answers and explanations (all explained after each question-answer):
1)
Question: What is the uppermost layer of vegetation in a forest called?
Answer: Canopy
Explanation: The branches and leaves of tall trees in a forest form the topmost layer, called the canopy. It looks like a roof and blocks sunlight from reaching the ground.
2)
Question: What is the dark-coloured substance formed from decaying leaves and animal droppings in the forest?
Answer: Humus
Explanation: Humus is formed when dead plants and animals decay in the forest. It enriches the soil by providing nutrients necessary for plant growth.
3)
Question: What is the process by which plants prepare their food using sunlight?
Answer: Photosynthesis
Explanation: Plants use carbon dioxide, water, and sunlight to prepare their food through photosynthesis. It also releases oxygen, making forests the ‘lungs’ of the Earth.
4)
Question: What is the term used for cutting down of trees on a large scale?
Answer: Deforestation
Explanation: Deforestation means clearing forests for development, farming, or other uses. It disturbs the balance of nature and leads to soil erosion, climate change, and loss of biodiversity.
5)
Question: Which organisms convert dead plants and animals into humus?
Answer: Decomposers
Explanation: Decomposers like fungi and bacteria break down dead organisms and waste materials into humus, making nutrients available to plants.
6)
Question: Which gas is absorbed by plants from the atmosphere during photosynthesis?
Answer: Carbon dioxide
Explanation: Plants absorb carbon dioxide from the air and use it in photosynthesis to produce food. Forests help in reducing the amount of carbon dioxide in the atmosphere.
7)
Question: What helps in dispersal of seeds in a forest?
Answer: Animals
Explanation: Animals eat fruits and drop seeds at different places. This helps in seed dispersal and growth of new plants in the forest.
8)
Question: What is the lowest layer of vegetation in a forest called?
Answer: Herbs
Explanation: Herbs grow close to the ground in a forest and form the lowest layer of vegetation. They are small plants with soft stems.
9)
Question: Which term is used to describe the wearing away of soil?
Answer: Erosion
Explanation: Erosion is the removal of the top layer of soil by wind, water, or human activities. Forests prevent soil erosion as the roots of trees hold the soil together.
10)
Question: What is the term used for the natural growth of new plants in a forest?
Answer: Regeneration
Explanation: Regeneration is the process of new plants growing naturally from seeds without human help. Forests have the ability to regenerate if they are not disturbed.
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