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प्रश्न
What are the possible dangers of global warming?
उत्तर
Following are the dangers of global warming:
(i) It can cause change in the weather and precipitation patterns on the Earth.
(ii) It can lead to the melting of polar ice caps and subsequently increase in the sea level, which, in turn, may submerge the cities located along the sea coasts.
(iii) It can lead to the melting of methane hydrates in polar ice and on the sea floor, which may increase the methane concentration in the atmosphere (methane burp).
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संबंधित प्रश्न
Briefly describe three aspects of nutrient cycles.
Complete the following table (Carefully study the carbon, oxygen, and nitrogen cycles).
| Bio-geo-chemical cycles | Biotic processes | Abiotic processes |
| 1. Carbon cycle | ||
| 2. Oxygen cycle | ||
| 3. Nitrogen cycle |
Correct and rewrite the following statement and justify your correction.
The flow of nutrients in an ecosystem is considered to be a ‘one-way’ transport.
Give reason.
The flow of nutrients through an ecosystem is cyclic.
Give reason.
Equilibrium is necessary in the various bio-geo-chemical cycles.
Explain the following with suitable examples.
What are the differences between the flow of matter and of energy in an ecosystem? Why?
All the factors of biosphere which affect the ability of organisms to survive and reproduce are called as ______.
Oxygen combines with iron found in the rocks to form ____.
During photosynthesis, carbon dioxide combines with water in the presence of sunlight to form ______.
What are bio-geochemical cycles? Explain how nitrogen is fixed in the atmosphere.
