Comprehensive Science Bowl General Science Notes

Atmospheric & Weather Phenomena

  • Tornadoes

    • Cause more U.S. weather-related deaths annually than any phenomenon except lightning.

    • Concentrated in Central & Southeastern United States (also the region with the world’s greatest number overall).

  • Fog

    • Defined as cloud at ground level; forms when air is cooled to its dew-point or becomes saturated by moisture addition.

  • Cyclone (engineering device)

    • Uses rapidly rotating airflow to segregate particles\text{segregate particles} from a gas stream.

    • West of the Mississippi is a major source of low-sulfur coal used in such controls.

  • El Niño (“the boy child”)

    • Warm surface-water invasion off Peru linked to global climate anomalies (floods, droughts, fisheries crashes).

  • Lightning / Thunder timing

    • A 5 s5\,\text{s} delay ≈ 1 mile1\,\text{mile} distance to strike (sound travels ≈1100 ft s−1\approx 1100\,\text{ft s}^{-1}).

  • Acid Rain

    • Lowest pH precipitation in U.S. occurs in the Northeast; linked to SO₂/NOₓ transport from coal combustion.

  • Atmospheric pressure

    • Roughly 2100 lb2100\,\text{lb} weight on each 1 ft21\,\text{ft}^2 at sea level (≈1 atmosphere, ≈14.7 psi\approx 14.7\,\text{psi}).

  • Time for sunlight to reach Earth ≈ 9.5 min9.5\,\text{min}.

  • Earth perihelion (closest to Sun) occurs in early January.

  • June 22 at the North Pole = 24 h24\,\text{h} daylight (midnight Sun).

  • Seawater freezes at a slightly lower temperature than fresh water due to dissolved salts (≈−1.9 ∘!C-1.9\,^{\circ}!\text{C}).

Earth Science, Geology & Geography

  • Stishovite

    • High-pressure quartz polymorph common only in meteor-impact structures; indicates shock metamorphism.

  • Dead Sea

    • Earth’s saltiest natural lake and lowest continental elevation (≈−430 m-430\,\text{m}).

  • Oklo, Gabon

    • Site of a natural fission reactor that operated ~2 billion years ago—evidence for nuclear chain reactions in nature.

  • Atolls

    • Form mainly by coral-reef growth as volcanic islands subside.

  • Famous glaciers: Grindelwald (Switz.), Bossons (Fr.), Dinwoody (U.S.), Wilson Piedmont (Antarctica).

  • Specific gravity of mercury at STP =13.6=13.6 (unitless ratio to water).

  • Hard-water ions: Ca2+, Mg2+, Fe2+/3+, Mn2+\text{Ca}^{2+},\,\text{Mg}^{2+},\,\text{Fe}^{2+/3+},\,\text{Mn}^{2+}.

  • Dendrochronology counts tree rings; Bristlecone pine (>4,600 yr) oldest living individual (“The Patriarch”).

Biology – Animals

  • Rabbits possess four incisors (two pairs) vs. rodents’ single pair—taxonomic distinction (Lagomorpha v. Rodentia).

  • Platypus

    • Egg-laying mammal (monotreme); showcases reptile-mammal evolutionary link.

  • Bats (order Chiroptera)

    • Nocturnal group comprising roughly ¼ of all mammalian species; crucial insect predators & pollinators.

  • Porcupine

    • Largest North-American rodent, equipped with quills (modified hairs with barbs for defense).

  • Narwhal

    • Arctic toothed whale; elongated left canine forms helical “tusk” (sensory organ).

  • Cheetah

    • Fastest land animal (≈100 km h−1100\,\text{km h}^{-1} sprint).

  • Lion

    • Only social (pride-forming) cat; group hunting improves success on large prey.

  • Dung beetle (scarab) revered in Egypt symbolizing rebirth.

  • Marsupials

    • Give birth to altricial young that complete development in a pouch (kangaroo, koala, opossum).

  • Bactrian camel

    • Two-humped species adapted to Central Asian deserts (stores fat in humps).

  • Giant squid

    • Largest invertebrate; eyes ~30 cm across, tentacles capture deep-sea prey.

  • Dogs sweat only via nose and paw pads; regulate heat primarily by panting.

  • Rats cannot vomit—basis for rodenticide susceptibility.

  • Goose flock = gaggle (on ground); skein or wedge in flight.

  • Shark skeleton is cartilage, not bone—lightweight & flexible.

  • Oldest land mammal by maximum lifespan record = humans.

  • First animal in orbit: dog “Laika.”

Biology – Plants & Ecology

  • Flax

    • Source of linen fiber & linseed oil (drying oil for paints).

  • Grass family (Gramineae/Poaceae) enormous, incl. brome, Bermuda, buffalo grasses; foundation of world cereals.

  • Oak, hickory, walnut, locust, hemlock families—examples with multiple species lists for dendrology studies.

  • Deciduous plants shed leaves seasonally.

  • Bryophytes (mosses & liverworts) comprise >20,000 non-vascular species.

  • Ring-neck pheasant is non-native (introduced from Asia).

  • Pollination vocab

    • Ornithophily = bird; Entomophily = insect; Anemophily = wind; Autogamy = self-pollination.

  • Bee honey production

    • ≈2×1062\times10^{6} flower visits per pound; emphasizes pollination workload.

  • Photosynthesis Nobel 1962: Melvin Calvin (Calvin cycle).

  • Tyndall effect = light scattering by colloidal particles ∝1/λ4\propto 1/\lambda^4 (blue-dominant; explains sky color).

  • Geotropism = directional growth toward gravity vector (roots positive, shoots negative).

  • Taxol (paclitaxel) anti-cancer chemotherapeutic from Pacific yew bark.

Chemistry & Materials

  • Petrified wood

    • Organic cells replaced by minerals (silica); forms via permineralization in volcanic ash settings.

  • Brass: Cu + Zn alloy; yellow, corrosion-resistant.

  • Bronze: Cu + Sn.

  • Pewter: Sn + Pb alloy (traditionally).

  • Stainless steel: Fe alloyed with Cr (≥10.5%10.5\%) for passivating oxide film.

  • Cyanide (prussic acid) & formaldehyde—toxic industrial chemicals; formaldehyde preserves tissues in HCHO\text{HCHO} solution.

  • Vulcanization

    • Goodyear’s process of cross-linking rubber with sulfur, enhancing elasticity & temperature range.

  • Sucrose (table sugar) = disaccharide \ce{C12H22O11}; non-reducing.

  • “Iso-” prefix indicates equal/same (e.g., isotopes, isothermal).

  • Cryogenics studies phenomena at very low temperatures (<−150∘!C-150^{\circ}!\text{C}).

  • Ergonomics optimizes human-tool interaction; design for safety & efficiency.

  • Ductile metals can be drawn into wire (Cu, Au, Al).

  • Coke (carbonized coal) + iron ore + limestone yield pig iron in blast furnace (limestone flux removes SiO2\text{SiO2} as slag).

  • Yellowcake = ammonium diuranate, intermediate in U production.

  • Lead poisoning = plumbism; symptoms neurological & hematologic.

  • Ethylene glycol main automotive antifreeze; lowers freezing point via colligative properties.

  • Hydrometer measures fluid density (battery electrolyte specific gravity).

  • Hygrometer measures atmospheric humidity.

  • TLC: Formal definition of pascal =1 N m−2=1\,\text{N m}^{-2} (SI pressure).

  • Photochemical smog includes ozone; ozone in stratosphere protective, at ground level pollutant.

Physics, Engineering & Mathematics

  • Printing press (~1450 AD, Gutenberg) revolutionized communication.

  • Fiber-optics: glass fiber transmits data as light; vastly higher bandwidth than copper.

  • Photon rest mass: 00.

  • Superconductivity = zero electrical resistance below T<em>cT<em>c; high-Tc cuprates ∼−350∘!F\sim -350^{\circ}!\text{F} (≈77 K77\,\text{K}).

  • Cryopump traps gases on cold surfaces for high vacuum.

  • Holography uses laser interference to record 3-D images.

  • OR, AND, NOR, etc.—digital logic families.

  • Filter: frequency-selective network; passes certain bands (e.g., low-pass, high-pass).

  • Flip-flop = bistable memory element.

  • Bipolar transistor elements: emitter–base–collector.

  • Three-phase motor reversal by swapping any two phase leads.

  • Brayton cycle governs jet engines & gas turbines (constant-pressure combustion).

  • Rankine cycle in steam power plants (typ. 35 % thermal-to-electric efficiency).

  • Brayton vs. Otto (spark-ignition) vs. Stirling (external-combustion closed cycle).

  • Decibel pain threshold ~120 dB120\,\text{dB}; tinnitus = persistent ringing post noise exposure.

  • Audio band: 20–20,000 Hz20–20{,}000\,\text{Hz}; UHF: 300–3000 MHz300–3000\,\text{MHz}.

  • Voltage–current phase in capacitor: current leads voltage by 90∘90^{\circ}.

  • Entropy quantifies disorder & directionality (Second Law).

  • Barn = 10−24 cm210^{-24}\,\text{cm}^2 nuclear cross-section unit.

  • Lightyear convertible to AU (1 ly ≈63,24063{,}240 AU).

  • Terameter =1012 m=10^{12}\,\text{m} (longest among kilo/centi/deka/tera options).

  • First liquid-fueled rocket launched by Robert Goddard (U.S.).

Medicine & Physiology

  • Penicillin

    • “Wonder drug” used by U.S. military 1941-44 before civil release; first true antibiotic.

  • Smoke inhalation accounts for ≈80%80\% of fire deaths vs. burns.

  • Osteoporosis = calcium loss from bone; treated with \ce{^{131}I} for hyperthyroid (radio-iodine).

  • Cystitis: urinary-bladder infection; Rhinitis: nasal mucosa inflammation.

  • Eustachian tube blockage reduces hearing during colds.

  • Glaucoma therapy = cholinergic drugs ↓ intra-ocular pressure.

  • Cataract? (not in text)

  • Nicotine: alkaloid insecticide & addictive stimulant.

  • Saccharin discovered by Ira Remsen, 1879 (“how sweet it is”).

  • Achille’s tendon connects gastrocnemius to calcaneus.

  • Vitamin C = ascorbic acid (anti-scurvy); B-complex includes thiamine, niacin, riboflavin.

  • Radon gas 2nd-leading lung-cancer cause.

  • Earliest chromosome studies: Gregor Mendel’s pea experiments.

  • Bends (decompression sickness) due to N₂ bubbles.

  • TCDD dioxin causes chloracne (skin eruptions).

Famous People & Nobel Laureates

  • Theodore Roosevelt: authority on U.S. game animals; conservationist.

  • First woman in space: Valentina Tereshkova (1963).

  • Jacques Cousteau co-developed Aqua-Lung (scuba).

  • Rachel Carson wrote Silent Spring (DDT risks).

  • Hygman Rickover “Father of Nuclear Navy.”

  • Alfred Russel Wallace co-developer of natural selection.

  • Wizard of Menlo Park = Thomas Edison.

  • Elijah McCoy invented automatic lubricator (“the real McCoy”).

  • Nobel-winning women scientists: Marie Curie (2 prizes), Irene Joliot-Curie, Gerty Cori, Dorothy Crowfoot Hodgkin, Rosalyn Yalow, Barbara McClintock, Gertrude Elion—total of 9 women (to 1991) in scientific categories.

  • Caroline Institute (Karolinska) awards Medicine Nobel.

Nuclear Science & Radiation

  • Natural U isotopes: 234U, 235U, 238U^{234}\text{U},\,^{235}\text{U},\,^{238}\text{U}; 235U^{235}\text{U} & 238U^{238}\text{U} key for power.

  • Uranium fuel form typically \ce{UO2} ceramic pellets.

  • Moderators: graphite used in first Chicago Pile-1; Chernobyl lacked containment building present in U.S. designs.

  • Spent fuel loses ≈80%80\% radioactivity in first year.

  • Average U.S. exposure ≈360 mrem yr−1360\,\text{mrem yr}^{-1}, mostly natural sources; SI equivalent sievert (1 Sv=100 rem).

  • Largest breeder reactor (as of 1991): France.

  • France leads in percent electricity from nuclear (~70+%, 1990); U.S. ~20 %.

  • Pressurized-water reactors dominate U.S. fleet.

  • Nuclear Waste Policy Act tasks U.S. DOE with geologic repository siting.

  • Oklo natural reactor validates long-term radionuclide containment.

  • \ce{I-131} treats hyperthyroidism; \ce{K-40} most common human-detectable radioisotope.

Energy, Environment & Technology

  • Coal combustion by-products: \ce{CO2},\,\ce{SO2},\,\ce{NOx},\,\ce{H2O}; particulate controls: ESP, baghouse, scrubbers, cyclones.

  • Wet SO₂ scrubbing sorbents: lime, limestone, NaOH/\ce{Na2CO3}.

  • U.S. electricity mix 1990: Coal 55 %; nuclear second; nighttime power cheaper due to lower demand.

  • Overall hydro-turbine × generator efficiency: 0.8×0.9=0.720.8\times0.9=0.72 (72 %).

  • Biomass energy from photosynthesis (wood, crop waste).

  • Fuel economy harmonic average: 20 mpg + 40 mpg vehicles → 26.7 mpg combined.

  • Compact fluorescent (15 W) replacing 65 W incandescent for 2000 h saves $10\$10 at 0.10 $/kWh0.10\,\$/\text{kWh}: ΔE=(65−15) W×2000 h=100 kWh\Delta E= (65-15)\,\text{W} \times 2000\,\text{h}=100\,\text{kWh}.

  • Automobile exhaust heat ≈35 % of fuel energy; overall engine ~25 % efficient.

  • Noise pollution: EPA threshold; tinnitus risk.

  • Greenhouse gases first identified by John Tyndall (1859).

  • Chlorofluorocarbons (Cl compounds) destroy ozone, causing Antarctic ozone hole.

  • Nitrous oxide (laughing gas) also greenhouse gas.

  • Environmental tobacco smoke designated a known human carcinogen by EPA.

  • PCBs (209 congeners) persist in food chain; banned in transformers.

  • Yucatán impact at K–T boundary (Cretaceous) linked to mass extinction.

  • Domestic fresh-water use ≈90 gal person⁻¹ day⁻¹.

  • EPA hazardous-waste characteristics: ignitable, corrosive, reactive, toxic.

Astronomy & Space

  • Twelve men have walked on the Moon (Apollo 11-17 missions, 1969-72).

  • First golf ball on Moon: Alan B. Shepard Jr. (Apollo 14, 1971).

  • First American in orbit: John Glenn (1962).

  • U.S. launched first liquid-fuel rocket (Goddard, 1926).

  • Sputnik 1 first man-made Earth satellite (USSR, 1957).

  • United States third-largest number of satellites? (Text lists France as third).

  • Sun contains ≈99 % of solar-system mass.

  • Greenwich Mean Time December offset: Washington DC is 5 hours behind → 12 noon EST when 5 p.m. GMT.

  • Contiguous U.S. spans 4 time zones; Earth has 24 time zones total.

Units, Measurement & Miscellaneous

  • Metrology = science of weights & measures.

  • Hydrometer vs. hygrometer; psychrometer (wet-dry bulb).

  • One cc of water has mass 1 g1\,\text{g} at 4∘!C4^{\circ}!\text{C} (max density).

  • Celsius = Fahrenheit at −40∘-40^{\circ}.

  • Kilowatt-hour cost calculations illustrated (see lighting example).

  • 1 quintillion = 101810^{18}.

  • Terrestrial radio bands: 80-m band ≈3750 kHz; UHF ≈300–3000 MHz300–3000\,\text{MHz}.

  • Hydrometer density reading assesses car-battery electrolyte state.

  • Yellow metal in Egyptian tombs (1500 BC) = mercury (“liquid silver,” Hg).

  • Lead abbreviation Pb from Latin plumbum → plumbism poisoning.

  • Limestones and oysters composed primarily of \ce{CaCO3}.

  • Automobile catalytic converter oxidizes CO & HC → \ce{CO2}+\ce{H2O}.

  • Glacier & volcano robot Dante exploring Mount Erebus, Antarctica.

  • Sound barrier first broken by Chuck Yeager (1947).

  • Bonsai = Japanese art of dwarf tree culture.

These bullet-point notes compile and contextualize every question–answer fact from the 53-page Science Bowl General Science transcript, organizing them by topic and adding definitions, significance, numerical values, and real-world connections for efficient study.