Explanation

• A seismograph is an instrument used to detect and record earthquakes.
• It consists of a mass attached to a fixed base
• During an earthquake, the base moves and the mass does not.

Last verified on 07-09-2026

Explanation

• An apiary is a place where beehives are kept and honeybees are raised.
• It is used for beekeeping (apiculture) and honey production.
• A person who keeps and manages honeybees is called a beekeeper.

Additional information:

• Sericulture: Rearing silkworms for silk production.
• Apiculture: The practice of beekeeping.
• Butterfly house: A place where butterflies are kept.

Last verified on 09-10-2026

Explanation

• An isohyet is a line on a map connecting places that receive equal amounts of rainfall during a specified period.
• It is commonly used in climatology, meteorology, and hydrology to show rainfall distribution.
• Iso- means “equal,” while -hyet relates to rainfall.

Additional information:

• Isotherm → line joining places of equal temperature.
• Isobar → line joining places of equal atmospheric pressure.

Last verified on 07-10-2026

Explanation

• Common salt is chemically known as sodium chloride (NaCl).
• It is an ionic compound composed of sodium and chloride ions
• Representing a 1:1 ratio of sodium and chloride ions
• Formula: NaCl
• Melting point: 801 °C
• Density: 2.16 g/cm³
• Boiling point: 1,465 °C

Question updated on 11-02-2026

Explanation

• Mycology is the branch of biology that studies fungi (fungus).
• It covers the structure, classification, growth, reproduction, and importance of fungi.
• Fungi include mushrooms, yeasts, and molds.

Additional information:

• Entomology → Insects
• Mineralogy → Minerals
• Acoustics → Sound

Last verified on 06-10-2026