(Encyclopedia) lancelet, name for small, fishlike lower chordate (see Chordata), also called amphioxus; it shows many affinities with the vertebrates. There are about 30 lancelet species, most…
(Encyclopedia)
CE5
Witch hazel, Hamamelis virginiana
witch hazel, common name for some members of the Hamamelidaceae, a family of trees and shrubs found mostly in Asia. The family includes the…
The National Weather Service publication Storm Data recorded a total of 449 deaths from lightning strikes between 1998 and 2008. According to the National Weather…
Baseball, football, and basketball may be our favorite games, but in other countries, different sports are just as popular. Here are a few of them. Cricket…
WHAT DO ARTISTS DRAW WITH? WHAT DO THE NUMBERS AND LETTERS ON PENCILS MEAN? IS DRAWING ALWAYS BLACK AND WHITE?SHADINGFIND OUT MOREDrawing uses lines, dots, or similar marks to create pictures and…
(Encyclopedia)
CE5
Ordinary light sources produce incoherent light, while a laser produces a beam of coherent light.
laser [acronym for light amplification by stimulated emission of radiation],…
(Encyclopedia) lightning, electrical discharge accompanied by thunder, commonly occurring during a thunderstorm. The discharge may take place between one part of a cloud and another part (intracloud…
