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人教2003课标版《Learning about Language》精品PPT课件优质课下载
gunpowder
= =
Work out the rules that will help you
decide what a discovery is and what
an invention is.
An invention is ________________________
__________________________________.
A discovery is _________________________
__________________________________.
existing in nature but not yet known
finding out something already
by human beings not existing before
something that was created
Discoveries often lead to inventions.
Newton ____________
gravity
discovered
discover/invent?
Stephenson ________
the train
invented
discover/invent?
Columbus
the New Continent
discovered