CBSE Science Class 7
Forests: Our Lifeline
Forests: Our Lifeline - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Very Short Q&A:
Q1: Name the resource that serves as green lungs and water purifying systems in nature.
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Q2: Elephants and Jackals live in the deeper area of the forest.True/False
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Q3: Forest provides a ______________ for many animals and plants.
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Q4: The variety of plants found in forests includes
- Shrubs
- Climbers
- Creepers
- All of the above
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Q5: What is crown of the tree?
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Ans:
The branchy part of the tree above the stem is known as crown of the tree.
Q6: There is similar kind of trees in every forest.True/False
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Q7: The types of animal also differ from forest to ____________.
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Q8: Name some insects found in forest.
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Ans:
Spiders, squirrels, ants etc.
Q9: Grass is eaten by____________ which in turn is taken by __________.
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Ans:
Insects which in turn is taken by frog.
Q10: Complete the following food chain:
Grass --->Insects __________ --->snake ---> ________.
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Ans:
Grass --->Insects ---> Frog ---> Snake ---> Eagle.
Q11: Name the process by which plants release oxygen.
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Q12: Plants also maintain balance of oxygen and carbon dioxide in the atmosphere.True/False
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Q13: The decaying animal _______________ provides nutrients to the seedling in the forest to grow.
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Q14: Name the living organism that helps in maintaining the supply of nutrients to the growing plants in the forest.
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Q15: Forest is dynamic living__________.
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Q16: Forest is full of life and ________________.
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Q17: The area surrounded by forest does not receive good rainfall.True/False
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Q18: The advantage of living in an area nearby or surrounded by forest is:
- Less rainfall
- Less noise pollution
- Unpleasant weather
- None of these
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Ans:
Less noise pollution
Q19: Name some factors responsible for clearing of forests.
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Ans:
Construction of roads and buildings, industrial development, increasing demand of wood etc.
Q20: Forest is on the verge of disappearing because of
- Overgrazing of animals
- Indiscriminate felling of trees
- Urbanisation
- All of the above
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Q21: Forest is source of medicinal plants. True/False
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Q22: The insects, butterflies, honeybees and birds help flowering plants in_________.
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Q23: A forest is a purifier of __________ and ____________ water.
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Q24: Name the plant that forms the lowest layer in forest.
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Ans:
Herbs form the lowest layer in the forest.
Q25: The decaying leaves and animal droppings in a forest enrich the soil nutrition in the form of humus. True/False
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Q26: Which of the following is not a forest product?
- Plywood
- Sealing wax
- Gum
- Kerosene
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Q27: Micro-organisms act upon the dead plants to produce
- Humus
- Sand
- Wood
- Mushroom
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Q28: What is canopy?
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Ans:
Tall trees which look like roof over other plants in the forest is called canopy.
Q29: Forests are the ___________for the forest dwelling communities.
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Q30: The different horizontal layers in the forest are known as understoreys.True/False
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Q31: Forest helps in causing floods.True/False
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Q32: Name any two forest products.
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Q33: _______________will endanger our life and environment.
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Q34: What is Endemic species?
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Ans:
When an animal or a plant is found in a specific area, it is known as an endemic species.
Q35: 35. The soil of the forest is moist and warm because it is covered with leaves and fruits. True/False
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Q36: Forest also acts as natural__________________ of rain water.
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