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Explain Reflection at curved surfaces.
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One roentgen is equal to _______ disintegrations per second.
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The term Ethnobotany was coined by ______.
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Define Ethnobotany and write its importance.
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Coronary heart disease is due to ______.
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What precautions can be taken for preventing heart diseases?
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Changes in lifestyle is a risk factor for occurrence of cardiovascular diseases. Can it be modified ? If yes, suggest measures for prevention.
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Removal of soil particles from the land is called ______.
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Nuclear energy is a renewable energy.
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Overgrazing prevents soil erosion.
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Match the following:
| 1. | Soil erosion | energy saving |
| 2. | Bio gas | acid rain |
| 3. | Natural gas | removal of vegetation |
| 4. | Green house gas | renewable energy |
| 5. | CFL bulbs | CO2 |
| 6. | Wind | non-renewable energy |
| 7. | Solid waste | lead and heavy metals |
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Soil erosion can be prevented by ______.
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A renewable source of energy is ______.
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Soil erosion is more where there is ______.
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What will happen if trees are cut down?
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What are the agents of soil erosion?
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How will you prevent soil erosion?
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What are the consequences of soil erosion?
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