MCQ Collection
Everyday Science MCQs
Physics, chemistry, biology basics.
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Correct Answer: C. Convert data for transmission between digital devices and communication networks
Explanation:
A modem modulates and demodulates signals for data communication.
Modern devices connect computers or routers to internet services.
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Correct Answer: A. Temporary storage of data and programs currently in use
Explanation:
RAM provides fast working memory for active tasks.
Its contents are usually lost when power is removed.
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Correct Answer: B. It increases the number of possible combinations
Explanation:
Longer, less predictable passwords are harder to guess or brute-force.
Unique passwords also limit damage from credential leaks.
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Correct Answer: C. A fraudulent attempt to trick users into revealing sensitive information
Explanation:
Phishing messages imitate trusted sources to steal passwords or financial data.
Users should verify links and requests independently.
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Correct Answer: D. It contains valuable materials and potentially toxic substances
Explanation:
E-waste can release lead, mercury, and other hazards if mishandled.
Specialized recycling also recovers metals and components.
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Correct Answer: C. Earth rotates on its axis
Explanation:
Earth completes one rotation in about 24 hours.
The side facing the Sun experiences daylight.
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Correct Answer: D. Earth's axial tilt changes sunlight angle during its orbit
Explanation:
Earth's axis is tilted relative to its orbital plane.
This changes day length and solar intensity through the year.
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Correct Answer: D. Saturn
Explanation:
Saturn's rings contain ice and rocky particles.
Other giant planets also have fainter ring systems.
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Correct Answer: A. A luminous sphere of hot plasma powered by nuclear fusion
Explanation:
Stars produce energy through nuclear fusion in their cores.
The Sun is the nearest star to Earth.
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Correct Answer: B. A vast system of stars, gas, dust, and dark matter
Explanation:
Gravity binds the components of a galaxy together.
The Milky Way contains the Solar System.
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Correct Answer: C. Milky Way
Explanation:
The Solar System lies within the Milky Way galaxy.
It is a barred spiral galaxy.
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Correct Answer: D. The distance light travels in one year
Explanation:
A light-year is a distance unit used in astronomy.
It is about 9.46 trillion kilometers.
