SCI 220 EXAM 4 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
Bloodstains will have similar patterns if they are caused by - Answers Similar occurrences
Blood drops are spherical during free fall because of - Answers Surface tension
Blood will stay spherical until it is acted on by a force - Answers true
Striking a smooth surface produces ________ satellite spatter - Answers few
Striking a rough surface produces ________ satellite spatter - Answers more
Force and spatter size are _________ related - Answers inversely
Little force creates ______ spatter drops - Answers big
Big force produces ________ spatter drops - Answers little
Larger spatter drops have larger mass and can travel _____ than small spatter drops with smaller
mass - Answers farther
Six general features of bloodstain patterns - Answers -Direction of origination
-Angle of blood upon a surface
-Location/position of body during bleeding
-Movement of bleeding person
-Minimum number of blows administered
-Approx. location of person inflicting blows
3 types of blood stains - Answers -Passive
-Transfer
-Impact
Passive Bloodstains - Answers Patterns created from the force of gravity
Transfer Bloodstains - Answers object comes into contact with bloodstains
Impact bloodstains - Answers Blood is projected through the air as result of force
Factors that affect bloodstains - Answers -Direction of travel
-Angle of impact
The __________ ________ of a bloodstain faces the traveling direction - Answers pointed end
___________ ___________ of a bloodstain indicate the traveling direction - Answers Distorted edges
Perfect circular shape - Answers = 90 degree
Stains become more elliptical with _____________ angle - Answers decreasing (smaller)
Tails become ___________ with decreasing angle - Answers longer
Types of blood spatter - Answers -Cast-off
-Arterial spray
-Contact/transfer
-Blood pools
-Blood flows
-Drip/trail pattern
-Impact
Cast-off Spatter - Answers Blood on an object gets flung onto a surface
Arterial Spray Spatter - Answers Injury to main artery or heart
Contact/Transfer Patterns - Answers Blood transfer from bloody to clean object
Simple Transfer - Answers Object touches without movement
Swipe pattern - Answers Bloody object moving across surface
Wipe Pattern - Answers Movement of an object through an existing stain
Blood Flows - Answers Movement of blood due to gravity
Blood Pools - Answers Blood collection on a level surface
May be absorbed and appear larger
Drip Trail Patterns - Answers Blood drops from injury or object that shows movement
Impact Spatter - Answers An object makes forceful contact with a blood source
Classifications of impact spatter - Answers -Low Velocity
-Medium Velocity
-High Velocity
Low Velocity - Answers Force travels at 5ft/s
minimum force (gravity)
Medium Velocity - Answers Force travels at 5-25ft/s
blunt force trauma
Bloodstains will have similar patterns if they are caused by - Answers Similar occurrences
Blood drops are spherical during free fall because of - Answers Surface tension
Blood will stay spherical until it is acted on by a force - Answers true
Striking a smooth surface produces ________ satellite spatter - Answers few
Striking a rough surface produces ________ satellite spatter - Answers more
Force and spatter size are _________ related - Answers inversely
Little force creates ______ spatter drops - Answers big
Big force produces ________ spatter drops - Answers little
Larger spatter drops have larger mass and can travel _____ than small spatter drops with smaller
mass - Answers farther
Six general features of bloodstain patterns - Answers -Direction of origination
-Angle of blood upon a surface
-Location/position of body during bleeding
-Movement of bleeding person
-Minimum number of blows administered
-Approx. location of person inflicting blows
3 types of blood stains - Answers -Passive
-Transfer
-Impact
Passive Bloodstains - Answers Patterns created from the force of gravity
Transfer Bloodstains - Answers object comes into contact with bloodstains
Impact bloodstains - Answers Blood is projected through the air as result of force
Factors that affect bloodstains - Answers -Direction of travel
-Angle of impact
The __________ ________ of a bloodstain faces the traveling direction - Answers pointed end
___________ ___________ of a bloodstain indicate the traveling direction - Answers Distorted edges
Perfect circular shape - Answers = 90 degree
Stains become more elliptical with _____________ angle - Answers decreasing (smaller)
Tails become ___________ with decreasing angle - Answers longer
Types of blood spatter - Answers -Cast-off
-Arterial spray
-Contact/transfer
-Blood pools
-Blood flows
-Drip/trail pattern
-Impact
Cast-off Spatter - Answers Blood on an object gets flung onto a surface
Arterial Spray Spatter - Answers Injury to main artery or heart
Contact/Transfer Patterns - Answers Blood transfer from bloody to clean object
Simple Transfer - Answers Object touches without movement
Swipe pattern - Answers Bloody object moving across surface
Wipe Pattern - Answers Movement of an object through an existing stain
Blood Flows - Answers Movement of blood due to gravity
Blood Pools - Answers Blood collection on a level surface
May be absorbed and appear larger
Drip Trail Patterns - Answers Blood drops from injury or object that shows movement
Impact Spatter - Answers An object makes forceful contact with a blood source
Classifications of impact spatter - Answers -Low Velocity
-Medium Velocity
-High Velocity
Low Velocity - Answers Force travels at 5ft/s
minimum force (gravity)
Medium Velocity - Answers Force travels at 5-25ft/s
blunt force trauma
