Scientific  Method  2012/2013  Checkpoint  #3  

Ê A  prediction  of  what  a  scientist  believes  will  be  the  outcome  of  an  experiment.  

A gives  information  that  can  lead  to  the  TEST  variable  (independent  Variable)  and  the  OUTCOME  variable  (dependent    variable).  

Ê  Can  also  give  clues  as  to  the  TEST  variable  (independent  variable)  and  the  OUTCOME  variable  (dependent  variable).  

What  is  the  Cause  or  TEST  variable?  

What  is  the  Effect  being    measured  or  the    OUTCOME  variable?  

Let’s  practice!!  

Ê  What  is  the  TEST  Variable  (independent)?    ____________________________  

Ê  What  is  the  Outcome  Variable  (dependent)?  ___________________________  

Brand  of  Battery  

Time  that  battery  lasts  

Ê  Can  also  give  clues  as  to  the  TEST  variable  (independent  variable)  and  the  OUTCOME  variable  (dependent  variable).  

The  test  variable  (independent)    is  graphed  on  the  ___________________.  

The  outcome  variable  (dependent)    is  graphed  on  the  ________________.  

X-­‐Axis  

Y-­‐Axis  

Let’s  practice!!  

Ê  What  is  the  TEST  Variable  (independent)?    ____________________  

Ê  What  is  the  Outcome  Variable  (dependent)?  __________________  

Type  of  Fertilizer  

Height  of  plant  

What  must  a  scientist  do  to  give  her  scientific  results  credibility?  

REPETITION  OF  RESULTS:  the  SAME  scientist    completes  more  trials  and  obtains  the  same  results.    

REPLICATION  OF  RESULTS:  OTHER  scientists  repeat  the  same  experiment  and  obtain  the  same  results.