1. Vocabulary 9
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2. Vocabulary 9 Language Arts Math Social Studies Science
1. Preface – introduction, foreword, preamble
1.absolute value – the number regardless of negative or positive; displayed as [4]
1.Significant - important
dependent variable - the event studied and expected to change when  the inde-pendent variable is 
changed.
2. Reliability – dependability, steadfastness
2.complement of an event
2.Philanthropy – giving to aid mankind
experimental group – a group of subjects who are exposed to the variable under  study:
3. sensory detail – descriptive words about sight, smell, taste, touch, feeling, sounds
3.compound - more than one
3.Altruism – true at all times and everywhere
independent variable – (in an experiment) a variable that is intentionally changed to observe its effect on the dependent variable.