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bulb

(Encyclopedia) bulb, thickened, fleshy plant bud, usually formed under the surface of the soil, which carries the plant over from one blooming season to another. It may have many fleshy layers (as in…

DK Science: Energy

POTENTIAL ENERGYKINETIC ENERGYCHEMICAL ENERGYFIND OUT MOREScientists define energy as the ability to do work. Energy makes things happen. The energy in sunlight makes plants grow, the energy in…

Weather: Putting the Machines to Work

Putting the Machines to WorkWeatherPrediction by NumbersRichardson's ExperimentPutting the Machines to Work One of the great contributions to the second Renaissance in meteorology was mathematician…

DK Science: Arachnids

CLASS: ARACHNIDASHEEP TICKCARING SCORPIONSPINNING SPIDERFIND OUT MORESpiders, scorpions, ticks, and mites have two body parts and four pairs of legs. They breathe using lung books (that look…

DK Science: Chemical Reactions

PHYSICAL CHANGENON-REVERSIBLE CHANGEREVERSIBLE CHANGEFIND OUT MOREIn a chemical reaction, the molecules of one substance break apart and join together with those of another substance to create a…

Sam's Time Travel Essay

Sam witnesses the parting of the Red Sea and other miracles   Related Links Moses How to Write a Five Paragraph Essay…

Sexually Transmitted Diseases: Gonorrhea

GonorrheaSexually Transmitted DiseasesIntroductionChlamydia: The Most Common STDGenital HerpesGenital Warts and HPVSyphilis: A Sexual Scourge with a Long HistoryGonorrhea Gonorrhea is a curable…

Geometry: The Law of Detachment

The Law of DetachmentGeometryTaking the Burden out of ProofsThe Law of DetachmentThe Importance of Being DirectProof by Contradiction: The Advantage of Being IndirectThe Given Information: Use It or…