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
451
The intensity of sound is measured in:
Answer:
Decibels
Sound intensity is expressed in decibels (dB), a logarithmic unit that quantifies sound pressure. Normal conversation is around 60 dB, while sounds above 120 dB can cause hearing damage. It is a standard measure in acoustics.
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452
World Water Day is observed annually on:
Answer:
March 22
World Water Day highlights the importance of freshwater resources. Celebrated on March 22 since 1993, it emphasizes sustainable water management. The UN sets annual themes to promote global awareness and action.
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453
Animals that feed on decaying organic matter are called:
Answer:
Detrivores
Detrivores, such as earthworms and millipedes, feed on decomposing organic material. By breaking down waste, they recycle nutrients into the ecosystem. They play a vital role in soil fertility and ecosystem balance.
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454
World Wetlands Day is observed on:
Answer:
February 2
World Wetlands Day marks the adoption of the Ramsar Convention in 1971. It is celebrated on February 2 each year to raise awareness about wetland conservation. Events focus on the ecological and economic value of wetlands.
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455
The official date of Earth Day is celebrated on:
Answer:
April 22
Earth Day is observed every year on April 22 to promote global environmental awareness. The first Earth Day was celebrated in 1970 in the United States. It is now recognized worldwide as a day to encourage sustainable practices and conservation.
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Perfect 🙌 Thanks for sharing the next batch. I’ll continue in the **same MCQ style** with shuffled options, marked answers, and short explanations (3–5 sentences each). Here’s the rewritten set:
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456
The area in which a species is naturally adapted to live is known as its:
Answer:
rea in which a species is naturally adapted to live is known as its:
A habitat is the natural environment where a species finds food, shelter, and mates. It includes both physical and biological conditions necessary for survival. Unlike a niche, which describes a species’ role, habitat refers to its physical location.
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457
In an ecosystem, each organism occupies a specific feeding stage known as a:
Answer:
n ecosystem, each organism occupies a specific feeding stage known as a:
Trophic levels describe an organism’s position in the food chain—such as producers, consumers, and decomposers. Energy transfer occurs from one level to the next, with efficiency losses at each step. Understanding trophic levels helps explain energy flow in ecosystems.
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458
The complex network formed by interconnected food chains is called:
Answer:
Food web
A food web shows how different organisms are interconnected through multiple feeding relationships. Unlike a single food chain, it reflects the complexity of ecosystems. This structure maintains ecological balance and resilience.
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459
The phenomenon of additional species appearing in ecotones between ecosystems is called:
Answer:
Edge effect
The edge effect occurs in ecotones, where the overlap of ecosystems creates greater biodiversity. Transitional zones provide diverse niches, attracting species from both sides plus unique edge species. This boosts local richness compared to core areas.
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460
The lion-tailed macaque, an endangered primate, is the key species of which Biosphere Reserve?
Answer:
Nilgiri
The Nilgiri Biosphere Reserve in the Western Ghats is home to the lion-tailed macaque. This species is endemic to India and listed as endangered due to habitat loss. Conservation programs in Nilgiri aim to protect this rare primate.
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