General Science & Technology Quiz

A.I. Oparin proposed the theory of chemical evolution of life in his 1924 book 'The Origin of Life'. His hypothesis suggested that organic molecules could form from inorganic precursors under early Earth conditions, eventually leading to primitive cells. Darwin proposed biological evolution by natural selection, Lamarck proposed inheritance of acquired characteristics, and Haeckel proposed recapitulation theory - none addressed chemical origins.

Alexander Graham Bell invented the telephone in 1876 and was awarded the first US patent for it. John Logie Baird invented television, Thomas Edison invented the phonograph and improved the light bulb, and James Watt improved the steam engine - none invented the telephone.

Einstein formulated the mass-energy equivalence principle E=mc², showing that mass and energy are interchangeable. This revolutionary concept became a cornerstone of modern physics. Planck contributed to quantum theory, Dalton to atomic theory, and Rutherford to nuclear structure, but none established this specific relationship.

Robert Koch identified the tuberculosis bacterium in 1882, developing his famous postulates for demonstrating pathogenicity. While he also investigated cholera and other diseases, his tuberculosis research was most groundbreaking. Koch received the 1905 Nobel Prize primarily for his TB work.

William Herschel discovered Uranus in 1781 using a telescope he built himself. This was the first planet discovered in recorded history. Galileo, Copernicus, and others studied planets but didn't discover new ones.

Charles Babbage designed the first mechanical computer, the Analytical Engine, earning him recognition as the 'father of the computer'. Edison worked on electrical devices, Mac Millan was a publisher, and Rangabhashyam is not associated with computing.

Sir Isaac Newton does not have an element named after him, unlike the other three scientists. Rutherfordium (Rf, 104) honors Ernest Rutherford, Seaborgium (Sg, 106) honors Glenn Seaborg, and Curium (Cm, 96) honors Marie Curie. Despite Newton's monumental contributions to physics, no element bears his name.

The shoulder joint (glenohumeral joint) is a ball-and-socket joint, where the rounded head of the humerus fits into the shallow glenoid cavity of the scapula. This structure allows wide range of motion in all directions. Hinge joints bend only one way (like elbows), pivot joints rotate (like the neck), and fixed joints don't move (like skull bones).

Earth's 23.5-degree axial tilt causes different hemispheres to receive varying amounts of direct sunlight throughout the year, creating seasons. When the Northern Hemisphere tilts toward the Sun, it's summer there; when it tilts away, it's winter. Day and night are caused by Earth's rotation, not tilt.

The moon's phases depend on its orbital position relative to Earth and Sun. As the moon orbits Earth, the angle between Earth, moon, and Sun changes, altering how much of the moon's illuminated half we can see from Earth. The moon's position in its 27.3-day orbit determines whether we see a crescent, quarter, gibbous, or full moon.

Oxygen should NEVER be used in a fire extinguisher because it would intensify combustion rather than suppress it. Fire extinguishers use substances that smother flames (like CO2), cool them (like water), or interrupt chemical reactions (like certain dry chemicals). Adding oxygen is essentially adding fuel, making fires worse.

Dmitri Mendeleyev has element 101 (Mendelevium) named after him, discovered in 1955. Tesla is honored with the tesla unit for magnetic field strength, not an element. Dalton and Franklin, while important chemists/physicists, do not have elements named for them.

The moon's phases depend on its orbital position around Earth, which changes the viewing angle of its sunlit half. The amount of moonlight we see varies from new moon to full moon as the moon progresses through its 29.5-day cycle.

Dmitri Mendeleyev has element 101 (Mendelevium) named after him, discovered in 1955. Tesla is honored with the tesla unit for magnetic field strength, not an element. Dalton and Franklin, while important chemists/physicists, do not have elements named for them.

Coulomb (C) is the standard unit for electric charge, measuring the quantity of electricity transported in one second by a current of one ampere. Volt measures potential difference, joule measures energy, and ampere measures current flow rate.