Tag: science & technology

Earth completes one rotation relative to the fixed stars in 23 hours, 56 minutes, and 4 seconds, called a sidereal day. This is slightly less than 24 hours due to Earth's orbital motion.

A sidereal year (Earth's actual orbital period) is approximately 365.2564 days. This differs from the calendar year of 365 days due to the precise measurement of Earth's orbit around the Sun.

All other planets in our Solar System are named after Roman gods (Mars, Venus, Jupiter, etc.). Earth is the exception, derived from Old English and Germanic words meaning ground or soil.

The Moon is tidally locked to Earth, meaning it rotates once per orbit. This synchronous rotation causes the same side to always face Earth, a phenomenon called tidal locking.

El Azizia in Libya recorded 58°C (136°F) on September 13, 1922, which was long considered the world's highest air temperature. Note: This record has since been invalidated, but the question reflects conventional quiz knowledge.

Angel Falls in Venezuela is the world's highest uninterrupted waterfall, with a total height of 979 meters (3,212 feet). It is nearly 20 times taller than Niagara Falls and significantly higher than Jog Falls.

Salt (sodium chloride, NaCl) is a compound formed by the chemical bonding of sodium and chlorine ions. Milk is a mixture (colloid), tin is an element, and vinegar is a solution of acetic acid in water. This tests understanding of pure substances vs mixtures.

The Richter scale measures the magnitude of earthquakes based on seismic wave amplitude. Tornadoes use the Enhanced Fujita scale, milk purity has various testing methods, and precipitation is measured in millimeters or inches. Note that Richter is misspelled in the question.

For a simple pendulum, frequency decreases as length increases. The exact relationship is f ∝ 1/√L, meaning frequency is inversely related to the square root of length. Option D captures this inverse relationship.

The humerus is the upper arm bone, and 'funny bone' is a colloquial term for the elbow area where the ulnar nerve runs against the humerus. Hitting this spot causes the characteristic tingling sensation. The humerus is not related to the thumb, wisdom tooth, or belly button.