Explanation

• Cumulonimbus clouds are tall, dense clouds associated with thunderstorms.
• They can produce hail, heavy rain, lightning, and strong winds.
• Hail forms when strong updrafts inside these storm clouds carry water droplets upward, where they freeze.

Last verified on 09-09-2026

Explanation

• The ovum (egg cell) is generally considered the largest cell in the human body.
• It is the female reproductive cell and can be seen with the naked eye as a tiny dot.
• The ovum is approximately 0.1 mm (100 micrometers) in diameter.
• In contrast, the sperm cell is one of the smallest human cells.

Last verified on 03-09-2026

Explanation

• Greenland is the world’s largest island.
• It is located between the Arctic and Atlantic Oceans.
• It belongs to the Kingdom of Denmark.
• Population is about 56,000 people only.
• Area: 2.131 million km²
• Maximum width: 1,050 km
• Location: North America region (Arctic area)
• Capital: Nuuk

Last verified on 06-06-2026

Explanation

• On 9 June, 2017 India and Pakistan became full members of the SCO.
• Full Form: Shanghai Cooperation Organisation (SCO)
• Founded: 15 June 2001
• Headquarters: Beijing, China
• Founder Members (2001): China, Russia, Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan
• Purpose: Regional security, economic cooperation, counter-terrorism, and cultural cooperation

Additional information:

Current SCO Member States (10):

1. China
2. Russia
3. Kazakhstan
4. Kyrgyzstan
5. Tajikistan
6. Uzbekistan
7. India (Joined: 9 June 2017)
8. Pakistan (Joined: 9 June 2017)
9. Iran (Joined: 4 July 2023)
10. Belarus (Joined: 4 July 2024)

Last verified on 26-07-2026

Explanation

• 1 Nanometer (nm) = 10⁻⁹ m

Additional information:

• 1 Kilometer (km) = 10³ m
• 1 Meter (m) = 10⁰ m
• 1 Millimeter (mm) = 10⁻³ m
• 1 Micrometer (µm) = 10⁻⁶ m

Last verified on 06-07-2026

Explanation

• The Andes Mountain Range is the longest continental mountain range in the world.
• It stretches along the western edge of South America.
• Its total length is about 8,900 km (5,500 miles).
• Highest peak of Andes: Aconcagua (6,961 m)

Additional information:

• Sutter Buttes is considered the smallest mountain range in the world.
• Location: California, USA
• It is also called the “World’s Smallest Mountain Range”.
• Highest mountain in world: Mount Everest (8,848.86 m)
• Second highest peak: K2 (8,611 m)
• Himalayas length: about 2,400 km

Last verified on 17-05-2026

Explanation

• Diamond is a naturally occurring allotropic form of carbon.
• Allotropy means a single element can exist in more than one form with different structures and properties.
• It is extremely hard.
• It has a high melting point.
• It is widely used in jewelry and cutting tools.

Additional information:

• Graphite – soft, good conductor
• Fullerenes (C60) – spherical molecules
• Carbon nanotubes – tubular, high strength
• Amorphous carbon – coal, soot
• Lonsdaleite – hexagonal diamond

Last verified on 17-01-2026

Explanation

• Sea water contains a high amount of dissolved salts.
• Because of salinity, its freezing point is lower than fresh water.
• Fresh water freezes at 0°C, but saltwater freezes at a lower temperature.

Last verified on 01-06-2026

Explanation

• Meteorology is the scientific study of the atmosphere, especially weather and climate.
• It involves forecasting and understanding atmospheric phenomena.
• Meteorology is a branch of the atmospheric sciences.
• Metrology is the scientific study of measurement.

Last verified on 03-04-2026

Explanation

• Vitamin D is essential for healthy bones.
• Its deficiency leads to Rickets in children and Osteomalacia in adults.
• Sunlight is the best natural source of Vitamin D.

Additional information:

Deficiency effects:

• Bone pain
• Weak bones
• Skeletal deformities

Other Vitamin Deficiencies:

• Vitamin A: Night blindness
• Vitamin C: Scurvy
• Vitamin B7 (Biotin): Hair fall

Last verified on 17-01-2026