Explanation

Confusion

Meteorology is a branch of the atmospheric sciences.

Metrology is the scientific study of measurement.

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Agrostology: Study of Grasses 

Agronomy: soil management and crop production 

Odontology: study of teeth 

Arthrology: Study of joints 

Nephrology: study of kidneys

Hematology: Study of blood  

Dermatology:  Study of skin

Explanation

Mercury (Hg) is used in thermometers.

Because it expands and contracts consistently with temperature changes.

It providing accurate readings.

It also emits ultraviolet light in fluorescent tubes when electrically excited.

Explanation

The human body typically has 206 bones

At the time of birth, there are 270 bones which fuse with time to come to a total of 206 bones.

The total bones of our body can be divided into:

• the axial skeleton (80) 
• the appendicular skeleton (126)

The newborn child has 300 bones.

Longest bone: Femur (thigh bone)

Shortest: Stapes (one of the 3 small bones inside the ear)

The human head has 22 bones.

Explanation

Silicon (Si) is the element most commonly used to fabricate solar cells and transistors.

Silicon is a semiconductor material that is widely used in the production of electronic components, including:

• Solar cells (photovoltaic cells)
• Transistors
• Microprocessors
• Diodes

Explanation

Dry ice is a solid form of carbon dioxide.

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"Dry ice" is solid, frozen carbon dioxide, which is sublimated at a chilly -78.5 °C (-109.3°F).

Dry ice is used primarily as a cooling agent.

Dry ice does not melt into a liquid when heated instead, it changes directly into a gas.

ND16-8-2023

Explanation

Diamond is an allotropic form of carbon.

Carbon is capable of forming many allotropes, which are structurally different forms of the same element, due to its valency.

Some of the well-known forms of carbon include:

• Diamond
• Graphite
• Graphene
• Lonsdaleite (hexagonal diamond)
• Graphenylene
• Carbophene
• AA'-graphite
• Diamane
• Amorphous carbon
• Nanocarbons
• Glassy carbon
• Carbon nanofoam
• Carbide-derived carbon
• Linear acetylenic carbon
• Cyclocarbons

Explanation

A light year is the distance light travels in one year — about 9.46 trillion kilometers.

It is commonly used to measure vast distances between stars and galaxies.

Astronomers use an effect called parallax to measure distances to nearby stars.

Parallax is the apparent displacement of an object because of a change in the observer's point of view.

Explanation

The lifespan of a red blood cell is around 120 days.

Blood cells are made in the bone marrow.

Explanation

The blue whale, a marine mammal in the suborder of baleen whales.

It is the largest known animal to have ever existed.

It measuring up to 30 meters (98 feet) in length and weighing 180 metric tons (200 short tons) or more.

Explanation

• Sunlight is a good source of vitamin D.
• When our skin is exposed to sunlight, it produces vitamin D, which is essential for bone health, immune function, and the regulation of calcium levels in the blood.
• Deficiency of Vitamin D results in Rickets.