Match the simple machine with the correct definition.

1.___pulley                                                                
2.___wedge
3.___first- class lever
4.___screw
5.___Inclinded plane
6.___second- class lever
7.___wheel and axle
8.___lever
9.___third- class lever


A. any slanting, flat surface
B. a rigid bar that rotates about a pivot called a fulcrum
C. an inclined plane wrapped around a cylinder
D. load is in the middle
E. two inclined planes placed back to back
F. a wheel turning around an axle inserted through its center
G. effort is in the middle
H. a circular lever that consists of a grooved wheel rotating about a hub
I. fulcrum is between the effort and load