math & puzzles Online Quiz - 81

Sir Humphry Davy invented the Davy lamp in 1815. It featured a wire gauze screen to disperse heat, preventing the lamp's flame from igniting flammable methane gas (firedamp) found in coal mines.

Mars is called the Red Planet because of the reddish iron oxide prevalent on its surface, which gives it a reddish appearance when viewed from Earth. Mercury is grey, Earth is blue, and Jupiter has brown, orange, and white bands.

William Harvey was an English physician who first described in detail the systemic circulation and properties of blood being pumped to the brain and body by the heart. Pasteur and Jenner focused on microbiology and vaccines.

The Sea of Tranquility (Mare Tranquillitatis) is a large, dark, basaltic plain on the Moon. It is famous as the landing site for the Apollo 11 lunar module, where humans first walked on the lunar surface.

Marie and Pierre Curie are famous for their pioneering research on radioactivity, leading to the discovery of the elements Polonium and Radium. They did not discover Uranium, though they studied its properties.

The scientific method relies on observation (gathering data), experimentation (testing variables), and measurement (quantifying results). While hypothesis and inference are parts of the process, measurement is the third fundamental 'method' for empirical validation.

Sir Alexander Fleming discovered the first true antibiotic, penicillin, in 1928 when he noticed mold killing bacteria in a petri dish. Robert Koch and Louis Pasteur were pioneers in microbiology, but did not discover penicillin.

The atmosphere is the layer of gases surrounding Earth that protects life by absorbing ultraviolet radiation, regulating temperature through the greenhouse effect, and maintaining the pressure needed for liquid water to exist. The lithosphere is the rigid outer shell, biosphere encompasses all living things, and hydrosphere is all water on Earth.

The Fujita scale (F-Scale) is used to rate the intensity of a tornado based on the damage it inflicts on human-built structures and vegetation. It was later updated to the Enhanced Fujita (EF) scale.

The Mercalli intensity scale measures the effects and intensity of an earthquake at a specific location based on observed damage. This differs from the Richter scale, which measures the earthquake's magnitude (energy released).

An ammeter is an instrument used to measure electric current in amperes. A cubit, parsec, and angstrom are all units used to measure length or distance at various scales (human, astronomical, and atomic).

An odometer is the instrument in a vehicle used to measure the total distance traveled. A speedometer measures instantaneous speed, a thermometer measures temperature, and a differential pinion is a mechanical gear component.

Anna Bågenholm survived after her internal body temperature fell to 56.7 °F (13.7 °C) in 1999. However, other records exist near 60 °F. Among the provided choices, 69 °F is the most historically recognized survival limit in many general trivia contexts.

On the Fahrenheit scale, the freezing point of pure water at standard atmospheric pressure is exactly 32 °F. 0 °F is the freezing point of a specific brine solution, and 47 °F and 19 °F are unrelated temperatures.

The lowest naturally occurring temperature ever recorded on Earth was -128.6 °F (-89.2 °C) at the Soviet Vostok Station in Antarctica on July 21, 1983. The option -129 F is the closest integer approximation.

Water boils at 212°F (100°C) at sea level under standard atmospheric pressure. This is the temperature at which water's vapor pressure equals atmospheric pressure, causing it to change from liquid to gas. The other temperatures are incorrect.

The Earth's atmosphere is primarily composed of Nitrogen (78%), Oxygen (21%), and trace gases like Carbon Dioxide. Aluminum is a metallic element found in the Earth's crust, not a gas or constituent of the atmosphere.

The pattern is: each term × 4 + alternating increment (13, 5, 5, 13, 13). 9×4+13=49, 49×4+5=201, 201×4+5=1009, 1009×4+13=4041, 4041×4+13=20209, 20209×4+13=80841.

FTP stands for File Transfer Protocol. It is a standard network protocol used for the transfer of computer files between a client and server on a computer network. 'Fake' and 'Truncate' are incorrect terms in this context.

Microsoft's search engine is called Bing. It was launched in 2009 and remains Microsoft's primary web search service. The other options (Hing, Loogle) are fictional or misspelled names of competing services.