General Chemistry Dictionary. (metal,metalloid) A nonmetal is a substance that conducts heat and electricity poorly, is brittle or waxy or gaseous, and cannot be hammered into sheets or drawn into wire. Nonmetals gain electrons easily to form anions . About 20% of the known chemical elements are nonmetals.
When and if your child comes to you and asks you to explain global warming, you need to know the basics yourself so you can effectively explain it to your child. Global warming refers to the gradual temperature increase that the Earth has experienced and is projected to continue to experience as time passes.lobal warming for kids can be a tough subject to approach. Not only are there conflicting scientific views regarding global warming, but you also don't want to give your young children the idea that they are inheriting a doomed Earth.
Learner's definition of GLOBAL WARMING. [noncount]. : the recent increase in the world's temperature that is believed to be caused by the increase of certain gases (such as carbon dioxide) in the atmosphere. â compare greenhouse effect. World leaders will address the problem of global warming.