6.Which simple machine is a bar that pivots or turns on a fixed point?
a.lever b.pulley c.wedge

7.Which simple machine contains a wheel that is used with a corol or a rope?
a.screw b.wheel and axle c.pulley

8.What type of simple machine is an axe?
a.wedge b.screw c.lever

9.What simple machine has a standing or sloping surface?
a.inchined plane b.lever c.pulley

10.What simple machine involves two circular objects a larger disc and a smaller cylinder, both joined at the center?
a.screw b.wheel and axle c.pulley​