General Knowledge Quiz for Class IV

A thermometer is a scientific instrument designed to measure temperature, which is the degree of hotness or coldness of an object or environment. The word comes from the Greek therme (heat) and metron (measure).

Honey is a sweet, viscous food substance made by honey bees from the nectar of flowers. Other options like sugar, jam, and marmalade are processed foods made by humans.

Dairy products such as cheese, butter, yogurt, and cream are produced from the milk of mammals, most commonly cows. Water, wine, and beer are not used as the primary base for dairy products.

ROM stands for Read-Only Memory, which is a type of non-volatile storage used in computers and other electronic devices. Data stored in ROM cannot be easily modified or written to, hence the term read-only.

These software applications are web browsers, which allow users to access and navigate the World Wide Web. They should not be confused with search engines or operating systems.

CPU stands for Central Processing Unit, which is the primary component of a computer that performs most of the processing inside the computer. It is often referred to as the brain of the computer.

Solar power is the conversion of energy from sunlight into electricity, either directly using photovoltaics or indirectly using concentrated solar power. The word solar is derived from the Latin word for Sun.

Pure water is neutral on the pH scale, which ranges from 0 (highly acidic) to 14 (highly alkaline). A pH of 7 represents a perfectly neutral solution.

The chemical formula of water is H2O. This means each molecule of water contains two hydrogen atoms bonded to one oxygen atom.

Nimbus, cumulus, and stratus are different classifications of clouds based on their appearance and altitude. For example, cumulus clouds are fluffy and white, while stratus clouds form flat, featureless layers.