Explanation

• Scurvy Cause: Vitamin C (ascorbic acid) deficiency. 
• Symptoms: Fatigue, weak and sore limbs, bleeding gums, easy bruising, delayed wound healing, and anemia. 

Additional information:

• Rickets: Caused by a deficiency in Vitamin D.
• Beriberi: Caused by a deficiency in Vitamin B1 (Thiamine).
• Night Blindness: Caused by a deficiency in Vitamin A.

Last verified on 09-10-2026

Explanation

• An apiary is a place where beehives are kept and honeybees are raised.
• It is used for beekeeping (apiculture) and honey production.
• A person who keeps and manages honeybees is called a beekeeper.

Additional information:

• Sericulture: Rearing silkworms for silk production.
• Apiculture: The practice of beekeeping.
• Butterfly house: A place where butterflies are kept.

Last verified on 09-10-2026

Explanation

• Microearthquakes are earthquakes with a magnitude of less than 2.0.

Additional information:

• Minor earthquakes: Commonly refers to low-magnitude earthquakes; exact ranges vary by classification.
• Major earthquakes: Generally refers to earthquakes of magnitude 7.0 or higher.

Last verified on 09-10-2026

Explanation

• Famous field: Medicine
• His famous medical work Kitab al-Hawi (The Comprehensive Book of Medicine) was widely influential.
• He also wrote an important treatise distinguishing smallpox and measles.

Additional information:

• Full name: Abu Bakr Muhammad ibn Zakariya al-Razi
• Born: c. 865 CE, Rayy, Persia
• Died: c. 925 CE

Last verified on 08-10-2026

Explanation

• Comets are small celestial bodies mainly composed of ice, dust, and rocky material.
• They travel around the Sun in highly elliptical or elongated orbits.
• Halley’s Comet, which returns approximately every 76 years.

Additional information:

• Asteroids: Mainly rocky or metallic bodies.
• Meteoroids: Small pieces of rock or metal moving through space.

Last verified on 05-10-2026

Explanation

Explanation

• Afforestation is the process of planting trees in an area where there were no previous forests.
• It helps in combating climate change, preventing soil erosion, and improving biodiversity.

Last verified on 07-10-2026

Explanation

• An isohyet is a line on a map connecting places that receive equal amounts of rainfall during a specified period.
• It is commonly used in climatology, meteorology, and hydrology to show rainfall distribution.
• Iso- means “equal,” while -hyet relates to rainfall.

Additional information:

• Isotherm → line joining places of equal temperature.
• Isobar → line joining places of equal atmospheric pressure.

Last verified on 07-10-2026

Explanation

• Omar-Khayam was the first to develop the Binomial Theorem and determine binomial coefficients.

Additional information:

• Omar-Khayam was born in Iran in 1048 AD.
• He was a famous poet, mathematician, and astronomer.
• He introduced the Jalali Calendar.
• It is also known as the modern Solar Hijri calendar.

Last verified on 07-10-2026

Explanation

• Ole Rømer was the first person to experimentally demonstrate that light has a finite speed in 1676.
• He used observations of Jupiter’s moon Io to estimate the speed of light.

Additional information:

• The modern accepted speed of light in vacuum is 299,792,458 m/s.

Last verified on 07-10-2026