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

• Minor objects with irregular shapes orbiting the Sun are called asteroids,
• It is also known as a minor planet
• They are found mainly in the asteroid belt between Mars and Jupiter.

Explanation

Astronomy is the science that deals with stars, planets, moons, and all objects beyond Earth’s atmosphere.

It helps in understanding the origin, evolution, and structure of the universe.

Explanation

The Steady State theory proposes that the universe has no beginning or end in time.

It suggests that as the universe expands, new matter is continuously created to maintain a constant density.

This theory was proposed by Fred Hoyle, Thomas Gold, and Hermann Bondi in 1948

Explanation

The outermost layer of the Sun is called the corona.

It is the Sun's outer atmosphere, extending millions of kilometers into space and visible during a total solar eclipse.

The innermost layer is the core, where nuclear fusion occurs.

Explanation

• 74 mph and above: Hurricane
• Below 39 mph: Tropical Depression
• 39–73 mph: Tropical Storm

Additional Information:

• Hurricanes are called Typhoons in the Western Pacific.
• They cause heavy rainfall, strong winds, and coastal flooding.

Last verified on 17-01-2026

Explanation

• In the Northern Hemisphere, air moves outward from high-pressure areas.
• It is deflected by the Coriolis effect.
• This causes winds to circulate in a specific direction around high pressure systems.

Additional information:

• High-pressure systems are also called anticyclones.
• Winds diverge outward from high pressure centers.

Last verified on 17-01-2026

Explanation

Bakelite is an insulator.

Additional information:

• Developed: 1907 by Leo Baekeland (Belgium/USA)
• Heat resistance: up to 250°C
• Electrical resistivity: ~10¹⁴ Ω·cm
• Used in: electrical fittings, telephones, radios, automotive parts

Last verified on 17-01-2026

Explanation

• Tsunami is a series of large ocean waves caused by underwater earthquakes, volcanic eruptions, or landslides.
• The destruction caused by a tsunami is mainly related to its height when it reaches the shore.

Additional information:

• 2004 Indian Ocean Tsunami: up to 30 m in some areas
• 2011 Japan Tsunami: ~40 m wave recorded in Miyako
• Average tsunami wave in open ocean: <1 m
• Speed in deep ocean: 500–800 km/h

Last verified on 17-01-2026

Explanation

Seawater is denser than freshwater due to its salt content.

According to Archimedes' principle, a floating object displaces a weight of fluid equal to its own weight.

The denser the fluid, the less volume is needed to equal the ship's weight.

This results in the ship floating higher in the water, decreasing its draft.