Explanation

Explanation

Explanation

Jabir Ibn Hayyan, commonly known as the 'Father of Arab Chemistry',

He was born in Persia, which is now known as Iran, in 721 AD

Notable ideas:

• Use of organic substances in chemistry
• Sulfur-mercury theory of metals
• Science of the balance
• Science of artificial generation

Explanation

Heavy water, also known as Deuterium Oxide (D₂O).

It is used as a neutron moderator in nuclear reactors.

Due to its ability to slow down neutrons without absorbing them.

Explanation

Radon is a gas that can be accumulated in poorly ventilated buildings.

Explanation

• A habitat is the natural environment in which a living thing resides.
• Including all the living and non-living factors that affect its survival and growth.

Explanation

The mass per unit volume of a substance is called density (density = mass/volume).

• The formula of Density is: D=m/v
• ****
• Here D is density,
• M is mass &
• V is Volume.
• Density is commonly expressed in units of grams per cubic centimeter.
• The standard units are kg/m³

Explanation

The process of applying a zinc coating to iron or steel to prevent rusting is called galvanizing.

This helps protect the metal from corrosion.

Explanation

Nicolaus Copernicus is often referred to as the "father of modern astronomy."

Explanation

Cyclones are usually accompanied by high rainfall.

heavy showers mean: A period of heavy rain

Cyclones mean  ایک قسم کی طوفان

heavy showers  زیادہ بارش/  بھاری بارش

ND16-3-2023