牛津上海版英语七上Unit 1 Controlling fire课件之一

Lets talk about the useful and harmful aspects of fire.Ok !make a fire cook food keep warm boil water cook food burn rubbish melt metals make glass lose their lives and homes burn a lot of trees Ask different pairs to choose from the following topics for their poster1)Fire-our friend 2)Be careful of fires1.How did early men make a fire?2.What did early men use fire for?3.Nowadays,do people use fire to cook food?4.What do workers use fire for in factories?5.What do people do to rubbish in some places?6.What may happen if we are not careful with fire?7.What kind of people may cause hill fires?