General Science Quiz

Water vapour is the gaseous state of water. It occurs when water evaporates or boils.

Edema is the medical term for the accumulation of fluid in tissues, historically referred to as dropsy.

Proteins are composed of amino acids, which always contain Carbon, Hydrogen, Oxygen, and Nitrogen. Sulfur is present in some amino acids (like cysteine) but not all proteins.

Crickets have tympanal organs (ears) located on their front legs, just below the knee, which allow them to detect sound vibrations.

The uvula is the small, fleshy, cone-shaped projection that hangs from the soft palate at the back of the mouth.

A lunar eclipse occurs when the Earth passes directly between the Sun and the Moon, casting its shadow on the Moon.

Ions are atoms or molecules that have gained or lost electrons, resulting in a net electrical charge. Protons and neutrons remain in the nucleus.

A manometer is a scientific instrument specifically designed to measure fluid or gas pressure. Ammeters measure current, thermometers measure temperature, and Vernier callipers measure length.

Valentina Tereshkova, a Soviet cosmonaut, became the first woman to fly in space in 1963. The Soviet Union achieved this milestone during the Space Race.

A heliograph is an instrument used for signaling by flashing sunlight using a mirror. It was historically used for long-distance communication.

A capacitor is an electronic component that stores electrical energy in an electric field. It does not produce magnetic fields or detect environmental changes.

As the tire heats up from friction while driving, the kinetic energy of the air molecules increases. According to the kinetic theory of gases, higher molecular speed results in more frequent and forceful collisions with the tire walls, increasing pressure.

A microphone is a transducer that converts sound waves (mechanical energy) into electrical signals. Loudspeakers perform the reverse, converting electrical energy into sound.

MP3 stands for MPEG-1 Audio Layer 3. It is a standard format for digital audio compression.

Alkaline batteries are primary cells, meaning they are designed to be used once and then discarded. Nickel-cadmium, Lithium-ion, and Nickel metal hydride are all secondary (rechargeable) battery chemistries.

MP3 players use non-volatile storage known as flash memory to store music files. This allows data to be retained even when the power is turned off.

Carbon nanotubes are cylindrical nanostructures made of rolled-up sheets of graphene (carbon lattices).

The SI unit for illuminance is the lux, which is defined as one lumen per square meter.

Historical data from the early 2000s indicates that Japan was a leading investor in nanotechnology research, often cited alongside the US and Europe in reports from that era.

Fluorescent lamps contain a small amount of mercury vapor. When electricity is passed through the lamp, the mercury atoms emit ultraviolet light, which is then converted to visible light by the phosphor coating.

IP rating stands for Ingress Protection. It classifies the degree of protection provided against the intrusion of solid objects, dust, and water.