The Duties of the Three Branches of Government (Video)
In this screencast, explore the legislative, executive, and judiciary branches of the U.S. government. External resource: www.usconstitution.com
This learning object shows how blood droplets are held together by a strong cohesive molecular force that produces surface tension in each drop and on the external force. Surface tension pulls the surface molecules of a liquid toward its interior, decreasing the surface area and causing the liquid to resist penetration.