Explanation

• 24-karat (24K) gold is considered the "best"
• Purity: 99.9% pure gold.
• Color: Rich, deep, bright yellow.

Additional information

• 22K Gold: 91.7% pure gold. It is mixed with harder metals like silver or copper.
• 18K Gold: 75% pure gold. It is highly durable and excellent for diamond settings 
• Carat is the unit of measurement for the physical weight of diamonds/gold.

Last updated by NA on 16-07-2026

Explanation

• Neon is the primary gas used in decorative and advertising lights
• The color of the light depends on the gas in the tube.

Additional information

• Argon: Produces a blue or (mixed with mercury) green/purple light.
• Helium: Glows yellow or pink.
• Krypton: Emits a whitish-yellow light.
• Xenon: Creates a violet/lavender light.

Last updated by NA on 16-07-2026

Explanation

• Oranges are well-known for being rich in Vitamin C.
• It is essential for immune function, skin health, and other bodily processes.

Additional information 

• Vitamins are essential nutrients
• That your body requires in small amounts to function, grow, and develop properly.
• They are divided into two main groups:
• water-soluble (like Vitamin C and the B-vitamins)
• fat-soluble (like Vitamin A, D, E, and K)

Last updated by NA on 16-07-2026

Explanation

• If the ozone layer disappears, harmful ultraviolet (UV) rays will reach the Earth's surface in much larger amounts.
• The ozone layer protects life by absorbing most of the Sun's harmful UV-B and UV-C radiation.
• Increased UV radiation can cause skin cancer, cataracts, and weakened immune systems.
• It can also damage crops, marine life, and ecosystems.
• The ozone layer is found mainly in the stratosphere.

Verified & Updated

Explanation

• Boiling point of water: 100°C
• Freezing point of water: 0°C
• Standard atmospheric pressure: 1 atm (760 mmHg)
• 0°C = 32°F
• 100°C = 212°F

Last verified on 06-07-2026

Explanation

• The laws of magnetic induction were given by Michael Faraday.
• Faraday proposed these laws in 1831 after discovering electromagnetic induction.
• The laws explain that a changing magnetic field induces an electromotive force (EMF) in a conductor.
• These laws are the foundation of electric generators and transformers.

Last verified on 06-07-2026

Explanation

• Sound cannot travel through a vacuum because there are no particles to carry sound vibrations.
• Sound needs a medium such as a solid, liquid, or gas to travel.
• Since space is nearly a vacuum, sound cannot be heard there.
• The speed of sound in a vacuum is 0 m/s.

Additional information:

• Infrasound: Below 20 Hz
• Audible sound: 20 Hz – 20,000 Hz (20 kHz)
• Ultrasound: Above 20 kHz
• Speed of sound in air: 343 m/s
• Speed of sound in water: 1,481 m/s

Last verified on 07-06-2026

Explanation

• The magnitude of an earthquake is measured by the Richter scale.
• It measures the energy released by an earthquake.
• The Richter scale was developed in 1935 by Charles F. Richter.
• It is used in seismology (the study of earthquakes).

Last verified on 30-06-2026

Explanation

• Jaundice is a condition characterized by yellowing of the skin and eyes.
• It is caused by excess bilirubin due to liver dysfunction or disease.

Last verified on 01-04-2026

Explanation

• The hottest planet in our solar system is Venus.

Additional information:

• The black planet is called Venus.
• The second-closest planet to the Sun is Venus.
• Slowest Rotating Planet
• No moon
• Similar in size to Earth

Last verified on 30-03-2026