The push or pull that can change the motion of an object
friction
matter
iron
force
a contact force that opposes the motion of an object.
friction
speed
magnet
iron
a noncontact force that pulls masses towards one another
position
gravity
friction
mass
a kind of metal that is magnetic
mass
gold
speed
iron
something that pulls iron and some other metal objects toward it
gold
iron
magnet
silver
the amount of matter in an object. Objects with more matter have more.....
brightness
light
darkness
mass
a hard metal that is made mostly from iron
gold
steel
silver
diamond
the action or process of changing position
singing
laughing
motion
dancing
A roller coaster has ....................
no speed
variable speed
constant speed
unchangeable speed
a plane has a ................
no speed
constant speed
variable speed
changeable speed
