Explanation

An isthmus is a narrow strip connecting two larger land masses and separating two bodies of water.

Explanation

Ozone (O3) is a gas found in the stratosphere.

A stratosphere layer of the atmosphere that extends from about 12 to 50 kilometers (7.5 to 31 miles) above the Earth's surface.

The ozone layer, also known as the ozonosphere.

Explanation

The process of taking air into the lungs is known as inspiration or inhalation, and the process of breathing it out is expiration or exhalation.

Air is inhaled through the mouth or the nose.

The sequence of air passage during inhalation is as follows:

Nostrils→pharynx→larynx→trachea→alveoli

Explanation

A pinhole camera works without lenses.

It uses a small aperture (pinhole) to project an inverted image of the scene onto the opposite surface.

Explanation

Zoology, branch of biology that studies the members of the animal kingdom and animal life in general.

Explanation

The cell is the basic structural, functional, and biological unit of all living organisms, including animals and humans.

It is the smallest unit of life that can replicate independently.

Explanation

Albert Einstein is one of the most influential physicists of the 20th century.

In 1905 Einstein published four landmark papers in physics.

Einstein was awarded the Nobel Prize for his work on: Special theory of relativity

Albert Einstein received his Nobel Prize one year later, in 1922.

Explanation

Oxy-acetylene welding is a very common welding process.

Gases used in welding and cutting processes include:

• shielding gases such as carbon dioxide, argon, helium, etc.
• fuel gases such as acetylene, propane, butane, etc.

oxygen, used with fuel gases and also in small amounts in some shielding gas mixtures

Explanation

• The freezing point of water is 0°C (zero degrees Centigrade). 
• The boiling point of water on the Centigrade scale (also known as the Celsius scale) 100°C (one hundred degrees Centigrade).

Explanation

About Jupiter

It is the heaviest planet in our solar system

It is the largest planet in our solar system

It rotates about once every 10 hours

It has 79 satellites

It is the fifth planet 

It is larger than the earth