Biology. How Scientists work.

#maggots

#redi's experiment 1668  #spontaneous generation - "life arises from nonliving matters"

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HYPOTHESIS

Reid's Hypothesis: Redi's wanted to know how come maggots appear  on meat after flies were around? easy :   they just laid such tiny eggs so people are not able to see them.

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                                                                              TEST

                                                Now we need to test this hypothesis BY AN EXPERIMENT:

             WE CAN ONLY CHANGE ONE THING (VARIABLE) DURING AN EXPERIMENT.

VARIABLE - THING THAT WE CAN CHANGE DURING AN EXPERIMENT. 

CONTROLED EXPERIMENT - in this experiment we can only change one thing (variable) at a time.

MANIPULATED VARIABLE - thing that is changed on purpose.

(covers)

RESPONDING VARIABLE - thing that changes as a result of changes in the manipulated variable.

(maggots appear, maggots doesn't not appear)

CONTROLED VARIABLE - NEVER CHANGES 

(meat, jars, location, T, time)

the idea of Spontaneous generation was refuted as a result of Redi's experiment. 

ALL LIVING THINGS COME FROM

 OTHER LIVING THINGS

if a hypothesis becomes very well supported , we can now consider a theory.

theory is very well tested explanation.