(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…
How Much Oxygen Is in the Air?Advanced-Level Science ProjectsEarth ScienceHow Much Oxygen Is in the Air?Which Is More Acidic, Snow or Rain? When you step outside and take a big breath of fresh air…
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…
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…
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…
(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…
