Explanation

Eugenics is the science of improving the human species by breeding out disease and disabilities, aiming to enhance the genetic quality of the human population.

This concept has been widely criticized and discredited due to its association with unethical practices, such as forced sterilization and discrimination.

Explanation

Eutrophication is the process where excessive nutrients, often from fertilizers, cause the overgrowth of plants and algae in water bodies.

As these plants decay, they deplete the oxygen, harming aquatic life.

Explanation

An altimeter is an instrument used to measure the altitude or height of an aircraft above the ground or sea level.

• Tachometer: Measures the rotation speed of an engine, typically in revolutions per minute (RPM).
• Hydrometer: Measures the density or specific gravity of liquids, commonly used for checking the concentration of solutions.

Explanation

Mirage is an example of:

• refraction of light
• total internal reflection

Example

When the reflected light ray reaches our eyes, it appears as coming from the sky or tree.

This inverted image creates an optical illusion of the presence of water or the presence of islands etc.

Explanation

Stainless steel is a alloys that contain a minimum of approximately 11% chromium, a composition that prevents the iron from rusting and also provides heat-resistant properties.

Explanation

In 1714, Dutch scientist  Daniel Gabriel Fahrenheit invented the first reliable thermometer,

using mercury instead of alcohol and water mixtures.

In 1724, he proposed a temperature scale which now bears his name.

Galileo made his first telescope in 1609

Barometer Inventor: Evangelista Torricelli

Steam engine Inventor: Thomas Savery

Microscope Inventor: Zacharias Janssen

Explanation

Horticulture is the study and practice of cultivating fruits, vegetables, flowers, and ornamental plants.

Including the design and management of gardens.

Explanation

Gamma rays are the highest energy photons, with energies typically above 100,000 electronvolts (eV).

They are a type of electromagnetic radiation, like X-rays and visible light, but with much shorter wavelengths and higher frequencies.

Explanation

A hygrometer measures the amount of water vapor (humidity) in the air.

It is widely used in meteorology, agriculture, and HVAC systems.

Types of hygrometers include mechanical, electronic, and psychrometers.

Maintaining proper humidity is important for health, comfort, and industrial processes.

Explanation

Whitehaven Beach is located in Queensland, Australia.

It is famous for its white silica sand.

It is part of the Whitsunday Islands.

It offering stunning views and clear turquoise waters.