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13.Heat energy travels from ______ to _____?
a.warm to cold
b.cold to warm
c.humid to warm
d.low to high teperaturte


14.What will happen if a magnet is placed near an iron or steel?
a.The object will give off an electric spark
b.The object will give off a magnetic spark
c.The object be repelled by the magnet
d.The object will be attracted to the magnet




19.you accidentally drop the iron fillings on the top of lour.What is the best way to separate the two materials?
a.Use a stainer with big holes
b.Pick the iron fillings with your hands
c.use a magnet to attract the iron fillings
d.Blow the flour to separate the iron fillings