Explanation

Tooth enamel is the white, visible part of the tooth and it is also the hardest part of the human body.

 The main mineral composition is hydroxyapatite, a crystalline of calcium phosphate.

Explanation

Symbol: H

Atomic mass: 1.00784 u

Atomic number: 1

Named by: Antoine Lavoisier (1783)

Explanation

At the top of the waterfall, energy is stored in the form of gravitational potential energy

but when it falls, it gets converted from potential to kinetic energy

Potential energy due to the object's height above the Earth is converted to kinetic energy as it falls

Explanation

When fossil fuels are burned,

they release large amounts of carbon dioxide,

a greenhouse gas, into the air

.ND18-5-2023

Explanation

Astronomy is the study of everything in the universe beyond Earth's atmosphere.

That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars 

Explanation

Pluto has snow-capped mountains covered in methane frost, and although they look similar to snowy mountain chains on Earth

Discovered: February 18, 1930

Discoverer: Clyde Tombaugh

Moons: Charon, Nix, Styx, Kerberos, Hydra

It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun.

It is the largest known trans-Neptunian object by volume

AGM 30.4.23

ND27-7-2023

Explanation

When the soap is in the form of micelles then it has the ability to clean the oily dirt which gets accumulated at the centre.

These micelles remain as colloidal solutions.

Therefore, the dirt from the cloth is easily washed away.

Explanation

The cerebrum is the largest part of the brain.

The largest part of the brain, the cerebrum has two hemispheres (or halves).

The cerebrum controls voluntary movement, speech, intelligence, memory, emotion, and sensory processing.

*****

RY4-12-2022

Explanation

Limestone consists of calcium carbonate,

which has the chemical formula CaCO3.

Calcium carbonate is a chemical compound.

It is a common substance found in rocks as the minerals calcite.

Explanation

Fresh milk has a pH value of 6.7.

Bacteria from the family of Lactobacillaceae are lactic acid bacteria (LAB) responsible for the breakdown of the lactose in milk to form lactic acid.