General Science Quiz for Class 6 to 8

Fungi are heterotrophic organisms that obtain nutrients by absorbing organic matter. They lack chlorophyll and cannot perform photosynthesis.

Water is a chemical compound consisting of two hydrogen atoms and one oxygen atom, represented by the formula H2O.

Atoms are composed of three main subatomic particles: protons, neutrons, and electrons. Therefore, all of these are components of an atom.

Diamond is an allotrope of carbon and is known as the hardest naturally occurring substance on Earth due to its strong covalent crystal structure.

Viruses are obligate intracellular parasites, meaning they require a living host cell to replicate and reproduce.

Electric current is measured using an ammeter. A voltmeter is used to measure electric potential difference (voltage).

Deforestation is the purposeful clearing of forested land. Afforestation and reforestation refer to the planting of trees.

Fossil fuels are formed from the remains of ancient plants and animals buried under high pressure and temperature over millions of years; coal and petroleum are primary examples.

The cell is considered the fundamental structural and functional unit of all living organisms.

Curd contains lactic acid, which is produced by the fermentation of milk by lactic acid bacteria.