Explanation

• The Troposphere contains about 75% of the atmosphere's mass.
• It is the lowest layer of Earth's atmosphere.
• Altitude Range: About 8 km at poles to 15–18 km at equator.
• Main Gases: Nitrogen (78%), Oxygen (21%), and other gases.ev

Verified & Updated

Explanation

• In a nuclear reactor, energy is produced due to a controlled chain reaction.
• A controlled chain reaction releases energy steadily and safely.
• Control rods are used to regulate the number of neutrons and prevent excessive reactions.
• This controlled process is used to generate electricity in nuclear power plants.

Additional information:

• An uncontrolled chain reaction occurs in nuclear bombs.

Last verified on 11-07-2026

Explanation

• Venus comes closest to Earth when it is between Earth and the Sun.

• Minimum distance: about 24 million miles (≈ 38 million km).

• This close approach occurs roughly every 584 days.

Additional Information:

• Mercury can be about 33 million miles away when Venus is on the far side of the Sun.

Last verified on 17-01-2026

Explanation

• Saturn is the second-largest planet in the solar system.
• Ganymede (Moon of Jupiter) is the largest satellite in the solar system.

Planets and Natural Satellites:

1. Mercury: 0
2. Venus: 0
3. Earth: 1 (Moon)
4. Mars: 2 (Deimos, Phobos)
5. Jupiter: 95
6. Saturn: 274
7. Uranus: 27

Last verified on 02-05-2026

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