Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.
• It is followed by oxygen (~21%), with other gases in much smaller amounts.

Last verified on 15-03-2026

Explanation

• The filament of an electric bulb is made of Tungsten.
• Because it has a very high melting point (~3422°C).
• It can glow brightly without melting.
• Tungsten provides efficient and long-lasting light in incandescent bulbs.

Last verified on 15-03-2026

Explanation

• All plants move Anticlockwise around Sun.
• All plants move anticlockwise around their axis.
• Earth rotates its axis from West to East.

Last verified on 15-03-2026

Explanation

• Law of Inertia = Newton’s First Law of Motion.
• States: “An object at rest stays at rest, and an object in motion continues in the same direction and speed unless acted upon by an unbalanced force.”
• Explains why seat belts are important in cars.
• Applies to all objects on Earth and in space.

Last verified on 13-03-2026

Explanation

• Sunlight is a good source of vitamin D.
• When our skin is exposed to sunlight, it produces vitamin D, 
• It is essential for bone health, immune function, and the regulation of calcium levels in the blood.
• Deficiency of Vitamin D results in Rickets.

Explanation

The kidney is the primary organ responsible for filtering blood in the human body.

Each kidney contains approximately one million microscopic units called nephrons

They actively remove metabolic wastes (such as urea and creatinine)

Explanation

• Horticulture means پھول، جڑی بوٹیاں، پھل اور سبزیاں کاشت کرنے کا علم
• Horticulture is the agriculture of plants.
  
  
  
  Additional information:
  • Agrostology: Study of grasses 
  • Agronomy: Soil management and crop production 
  • Odontology: Study of teeth 
  • Arthrology: Study of joints 
  • Nephrology: Study of kidneys
  • Hematology: Study of blood  
  • Dermatology: Study of skin

Last verified on 30-01-2026

Explanation

H5N1 is a type of influenza virus

Causes a highly infectious

Also known as avian influenza.

Occurs mainly in birds, is highly contagious among birds, and can be deadly, especially in domestic poultry

Explanation

Sunlight is composed of a spectrum of light 

A spectrum revealed by Isaac Newton using a prism

That includes seven colors, which are (ROYGBIV)

1. Red
2. Orange
3. Yellow
4. Green
5. Blue
6. Indigo
7. Violet

Explanation