15. Images: Slide 10: www.flickr.com/photos/kr2/415957295/ from kennethalan Slide 11: www.flickr.com/photos/kimmo-quva/4176512966/ from KimmoPalosaari. (Screws) www.flickr.com/photos/sis/106836361/ from Sister72 (Wedge) Slide 12: www.flickr.com/photos/22863752@N06/2787237955/ from di the huntress (Lever) www.flickr.com/photos/acidcookie/168518455/ from anne.oeldorfhirsch (Inclined Plane) Slide 13: www.flickr.com/photos/baccharus/3412305312/ from Milestoned (Wheel) www.flickr.com/photos/krossbow/3174794741/ from krossbow (Pulley) Diagrams: created by Angela Bergsma. Information from: www.atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm www.mikids.com/Smachines.htm