CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -A falling drop of blood when it impacts a surface directly below will generally produce circular-shaped patterns. The diameter of a bloodstain will increase as the distance that the blood drop falls increases until the acceleration of the drop remains constant and terminal velocity is reached.

Detailed explanation-2: -It was shown that the size of the bloodspots increases with the increasing height of fall: the greater the height the larger is the diameter of the bloodspots. Given that the drop volume is known, the size of the bloodspots can be used to determine the height of the suspended bloodstained object.

Detailed explanation-3: -Increasing velocity of the drop also causes an Increase in the diameter of the spatter in passive drops of blood. Passive drop increases velocity as it falls due to effects of gravity. Velocity increases when drops fall from greater heights, however, patter will not become larger at heights above 7 feet.

Detailed explanation-4: -However, there are a variety of factors that influence the appearance of a blood droplet after it has left the object to which it was previously attached. The surface upon which it lands, the angle and velocity at which it falls, and the volume of the droplet will all influence the spatter appearance.