General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
431
Forests are examples of which type of ecosystem?
Answer:
Terrestrial ecosystem
Forests are land-based (terrestrial) ecosystems dominated by trees, shrubs, and animals. They provide oxygen, regulate climate, and support biodiversity. Marine ecosystems, by contrast, are ocean-based.
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432
Primary consumers in a food chain are also known as:
Answer:
Herbivores
Herbivores feed directly on producers like plants, making them primary consumers. Examples include deer, rabbits, and cows. They form the second trophic level in ecosystems.
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433
Which pigment is essential for photosynthesis?
Answer:
Chlorophyll
Chlorophyll is the green pigment in plants that captures sunlight for photosynthesis. It converts light energy into chemical energy. Without chlorophyll, plants cannot produce food or oxygen.
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434
The historical monument most affected by acid rain in India is:
Answer:
Taj Mahal
The Taj Mahal’s marble surface has been corroded by acid rain caused by sulfur dioxide and nitrogen oxides from industries. This led to discoloration and weakening of its structure. Conservation measures are ongoing to protect it.
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435
The area where a river meets the sea is called:
Answer:
rea where a river meets the sea is called:
Estuaries are semi-enclosed coastal bodies where fresh river water mixes with saltwater. They are rich in nutrients and biodiversity. Estuaries also act as natural buffers against floods and storms.
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436
The excessive presence of solid, liquid, or gaseous compounds in the atmosphere is known as:
Answer:
Air pollution
Air pollution results from pollutants like carbon monoxide, sulfur dioxide, and particulate matter. It causes respiratory diseases, acid rain, and global warming. Controlling emissions is vital for environmental health.
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437
Any unfavorable alteration of the environment is called:
Answer:
ny unfavorable alteration of the environment is called:
Environmental pollution occurs when harmful substances or energy are introduced into air, water, or soil. It degrades ecosystems, affects human health, and disrupts biodiversity. Other terms like eutrophication are specific forms of environmental change.
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438
Natural earthquakes are caused by movement of the:
Answer:
re caused by movement of the:
Earthquakes occur due to sudden movements of tectonic plates within the Earth’s crust. These movements release seismic energy, causing ground shaking. Most earthquakes are concentrated along plate boundaries.
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439
Resources that can be naturally replenished by ecological processes are called:
Answer:
Renewable
Renewable resources include sunlight, water, forests, and wind energy. These can regenerate naturally if used sustainably. In contrast, non-renewable resources like coal and oil cannot be quickly replenished.
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440
The study of individual organisms in relation to their environment is called:
Answer:
Autecology
Autecology focuses on the ecology of a single species, studying how it adapts to its environment. It differs from synecology, which studies communities of species. This branch helps understand species-specific survival strategies.
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