chapter 1 (#1) Flashcards
science
looking at natural world.
orginized information.
providing evidence.
hypthesis
explanation based on evidence.
data
information.
quanitative- can count/measure
qualitative- describing
inference
explanation based on prior knowlodge
experiment
testing hypothesis.
(controlled experiment)
controlled experiment
only change 1 variable (thing).
manipulative variable (independent)
variable that changes in controlled experiment.
responding variable (dependent)
variable changes accurding to manipulative variable.
Anton Van Leeuwenhoek
used microscope to see orginisms
Zacherious Jansen
invented microscope
Francesco Redi
challanged concept “spotanious generation”
experiment: 2 meats, one covered one uncoevered. over time magots appeared on uncovered one. prooves something must come from someting.
(flys were able to touch meat and make maggots)
spontanious generation
something coming from noting
John Needhom
heated gravy, killing all micro-orginisms, after time micro-orginisms are back!
Spallanzanis
boiled gravy, closed one and not the other. closed one was clean but uncovered on was infested.
prooves micro-orginisms come from the air. not spontanious generation
Louis Pasteur
took flask and bent top, boiled broth. no orginsims for 1 year. broke off curve micro-orginsms came.
prooves- living things come from something.