3rd 9 weeks

A group of bones forming the frame for the body is the ____

• cartilage

• ligament

• skeleton

The 33 bones in the back that protect the spinal cord are the ____

• A. vertebrae

• B. phalanges

• C. ribs

Bones have a hard outer layer and then a layer of ____ bone.

• jelly-like

• light, spongy

• soft, heavy

Some bones are filled with soft, jelly-like material that produces new blood cells. This material is called ____

• cartilage

• ligament

• marrow

An immovable joint can be found in the ____

• elbow

• hip

• skull

A joint that allows only back-and-forth movement is a ____ joint.

• ball-and-socket

• hinge

• pivot

A joint that allows side-to-side movement is a ____ joint.

• ball-and-socket

• hinge

• pivot

A simple machine that is made up of one or more inclined planes and is used to force materials apart is a ____.

• pulley

• wedge

• wheel and axle

An inclined plane wrapped around a cylinder is a ____.

• pulley

• screw

• wheel and axle

Work is done when a force moves an object over a distance. True or False?

• True

• False