https://padlet.com/kexinwan/duvwu17ppk9s Every student is required to post their proposed approach to weld the railroad and at least evaluate one of their peer's proposal. en-us 2016-12-19 06:46:33 UTC 2016-12-20 06:15:18 UTC hello@padlet.com kexinwan https://padlet.com/kexinwan/duvwu17ppk9s/wish/144413823 Aluminium reduces the red iron(III) oxide to form elemental iron, because aluminium forms stronger, more stable, bonds with oxygen than iron.]]> 2016-12-20 06:13:20 UTC https://padlet.com/kexinwan/duvwu17ppk9s/wish/144413823