And some may have temporary behavior problems due to stress. For example, the birth of a sibling, a divorce, or a death in the family may cause a child to act out. Behavior disorders are more serious. They involve a pattern of hostile, aggressive, or disruptive behaviors for more than 6 months. The behavior is also not appropriate for the child's age.
Fundamental Ambiguity in the Definition of Vertical Motion Geoffrey Blewitt Mackay School of Earth Sciences and Engineering, University of Nevada, Reno, USA. Abstract. Vertical motion is generally described as motion normal to some defined horizontal surface or family of surfaces. Such a surface can be con-structed geometrically or gravitationally.
1 adj Something that is vertical stands or points straight up., (Antonym: horizontal) The gadget can be attached to any vertical or near vertical surface. Cut each bulb in half vertically. 2 n-sing The vertical is the direction that points straight up, at an angle of 90 degrees to a flat surface. the N. Pluto seems to have suffered a major collision that tipped it 122 degrees from the vertical.