Explanation

The troposphere is the lowest layer of the atmosphere

It is where weather occurs and contains about 75% of the atmosphere’s mass.

The principle constituent of the atmosphere of the Earth is called Nitrogen.

Explanation

Jupiter has the shortest day of any planet in our solar system

It completes one rotation in approximately 9 hours and 56 minutes.

It is also the fastest-spinning planet in the solar system.

Explanation

Dynamite was invented by Alfred Nobel in the 1860s.

Additional Information REKATED ALFRED NOBEL

He was a chemist from Sweden.

Full name: Alfred Bernhard Nobel

Born: October 21, 1833, Stockholm, Sweden

The founder of the Nobel Prize

Invented Nitro-glycerine in 1875.

Died: on December 10, 1896, in Sanremo, Italy

Explanation

Oxygen constitutes about 21%, or more precisely 20.95%, of the Earth's atmosphere by volume

Present about one-fifth of the air.

Supports respiration.

Needed for combustion.

Maintains balance in the atmosphere.

Explanation

A mixture of two or more metals (or a metal with non-metals) is called an alloy

An alloy is made by mixing metals.

It improves strength and durability.

Steel (iron and carbon), is an example of an alloy.

Explanation

Heat from the Sun reaches Earth through radiation

It is the transfer of energy via electromagnetic waves (like infrared, visible light, UV) 

Sunlight takes an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.

Explanation

Ethnology is the branch of science that deals with the study of races, cultures, and ethnic groups of humans.

The study of human races, particularly their physical characteristics, origins, and distribution

Explanation

The vitamins not stored in the human body are Vitamin C and most B-complex vitamins

 Because they dissolve in water, the kidneys filter out what isn't immediately used, preventing buildup and toxicity but necessitating daily replenishment. 

Vitamin C (Ascorbic Acid): Essential for collagen and immune function, but any surplus is flushed out. 

B Vitamins (except B12): Includes Thiamin (B1), Riboflavin (B2), Niacin (B3), Pantothenic Acid (B5), Pyridoxine (B6), Biotin (B7), and Folate (B9). 

Explanation

Light from Sun travels a distance of  150 Million km before it reaches Earth

Distance: ~93 million miles (150 million km) on average.

Speed of Light: ~186,282 miles/second (300,000 km/s) in a vacuum.

Travel Time: Approximately 8 minutes, 20 seconds (or 500 seconds).

Explanation

Breakbone fever is another name for Dengue.

It is a viral disease transmitted by Aedes mosquitoes.

It causing severe joint and muscle pain.