The first objective was for them to explain why a folded up piece of foil will sink, while the same size piece of foil formed into a boat shape would float.
(The first objective; was; for them to explain why a folded up piece of foil will sink) (the same size piece of foil formed into a boat shape; would float; ) (them; to explain; why a folded up piece of foil will sink, while the same size piece of foil formed into a boat shape would float) Context(them to explain,List([28, 43))):(a folded up piece of foil; will sink; ) (the same size piece of foil; formed; into a boat shape)
them to explain,List([28, 43))
The first objective the same size piece of foil formed into a boat shape them a folded up piece of foil the same size piece of foil
was would float to explain will sink formed
for them to explain why a folded up piece of foil will sink
why a folded up piece of foil will sink, while the same size piece of foil formed into a boat shape would float
into a boat shape