PBS 1.1

Forensic Scientists

The application of law and science to resolve questions.

Polygraph Tests

Lie detectors tests to determine if someone is telling the truth.

Vital Signs

Measurements of essential body functions like, blood pressure, respiratory rate and pulse.

Heart Rate

How many times your heart beats in a minute.

Pulse

Rhythmic expansion and recoil of arteries resulting from blood contraction.

Blood Pressure

Pressure exerted by the blood upon the walls of the blood vessels.

Respiration Rate

Breaths per minute

Skin Conductivity

The amount of sweat produced through the ability to conduct electricity.

Control

Group that is served as comparison.

Experiments

A research study conducted to understand a natural phenomenon.

Hypothesis

A statement predicting the outcome of the experiment.

Experimental Design

Set of steps planned for an experiment to investigate problems.

Iterative

Repeating steps over and over until desired outcome is obtained.

Independent Variable

Researcher changes variables.

Dependent Variable

Variable being measured. It is the data.

Trace Evidence

Tiny fragments of physical evidence