Scientific Method
information gathered from observations
data
The number of variables that should be tested at a time in a controlled experiment
one
this scientist tested the hypothesis that flies produce maggots
Redi
this is a disadvantage of both transmission and scanning electron microscopes
can’t observe live organisms
this proposed scientific explanation for observations must be testable to be useful
hypothesis
this proposed scientific explanation for observations must be testable to be useful
hypothesis
publication in which scientists publish the results and conclusions of their experiments
scientific journal
Needham claimed that spontaneous generation could occur and designed an experiment boiling this substance to prove his claim
gravy
this is an advantage of scanning electron microscopes
higher magnification
type of data that are expressed as numbers
quantitative
the six steps of the scientific method in order are
Identify the problem, gather info, make hypothesis, test hypothesis, analyze data, and draw conclusions
An experiment tests whether a Corvette is faster than a Mustang, the type of car is this kind of variable
independent variable
Idea that living things can come from nonliving matter
spontaneous generation
life comes only from other living things
biogenesis
two ways of testing hypotheses
performing controlled experiment and gather more data
two ways of testing hypotheses
performing controlled experiment and gather more data
The variable that is measured in an experiment, such as the speed of two different types of cars
responding variable
how Spallanzani improved upon Needham’s experiment
sealed one of the flasks containing boiled gravy
a light microscope is preferable in which circumstance
when you want to observe living organisms
three ways scientists generate hypotheses
using prior knowledge, logical inference, and informed, creative imagination
Well-tested explanation that unifies a broad range of observations
scientific theory
Type of experiment in which one variable is changed and the others are held constant
controlled experiment
how Pasteur improved upon Spallanzani’s experiment to test the hypothesis of spontaneous generation
added a curved neck to the flask so that air could enter, but not microorganisms
two characteristics that help us show that a turtle is living
Reproduce, Grow, Need Energy, Homeostasis, Evolve, Contain DNA, Made up of Cells, Respond to the Environment
trait of good scientists that causes them to question existing ideas and new hypotheses
skeptical