Practice PPSC General Knowledge questions with answers and explanations.
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A seismograph records ground motion caused by earthquakes.
The recorded trace is called a seismogram.
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An anemometer measures wind speed.
It is commonly used at weather stations.
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Light travels at about 300,000 kilometers per second in vacuum.
The exact value is approximately 299,792 km/s.
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Mercury is the innermost planet of the Solar System.
It completes an orbit faster than any other planet.
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Human cells use oxygen in cellular respiration.
The process releases energy from food molecules.
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Solar radiation drives weather, climate, and photosynthesis.
Other energy sources are much smaller for the surface system.
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Wind turbines convert the kinetic energy of moving air into electricity.
It is a renewable energy source.
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Severe vitamin C deficiency causes scurvy.
Symptoms include weak gums, bruising, and poor wound healing.
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Carbon dioxide is a major greenhouse gas released by fossil-fuel use.
It traps heat in Earth's climate system.
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Vitamin D deficiency can impair bone mineralization in children.
The resulting condition is called rickets.
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Recycling processes used materials into new products.
It can reduce waste and demand for raw resources.
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Iron is a key component of hemoglobin.
Insufficient iron can lead to iron-deficiency anemia.
