32 terms

Miller and Levine Biology Chapter 1

STUDY
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science
an organized way of gathering and analyzing evidence about the natural world; a body of knowledge; a way of looking at the world
observing
the act of noticing and describing events or processes using the 5 senses
inferring
logical interpretation based on what scientists already know and the data collected
hypothesizing
making a scientific explanation for a set of observations that can be tested in ways that support or reject it (never "proven")
controlled experiment
experiment in which only one variable is changed
independent variable
variable that is deliberately changed by experimenter (IV); aka manipulated variable
dependent variable
variable that is observed and changes in response to the independent variable (DV); aka responding variable
control group
exposed to the same conditions as the experimental group except for one independent variable
communicating
sharing ideas via scientific conferences, publishing in scientific journals or presenting scientific posters; required for peer review, recognition and funding
theory
a well-tested explanation that unifies a broad range of observations and hypotheses and allows predictions about new situations to be made
bias
particular preference or point of view that is personal rather than scientific
biology
study of life
DNA
deoxyribonucleic acid; genetic code containing complex information needed to grow, live and reproduce
peer review
important process for sharing and evaluating scientific work
skepticism
willingness to question existing ideas, refusing to accept explanations without evidence
open-mindedness
willingness to accept different ideas that may not agree with your own thinking
stimulus
change in the environment; a signal to which an organism responds
homeostasis
keeping internal environment relatively stable even when external conditions change (ex. human body temperature stays at 98.6 degrees F)
metabolism
combination of chemical reactions through which an organism builds up or breaks down materials. A characteristic of living things.
biosphere
literally means "living planet"
Herpetologist
One who studies reptiles.
Cells
Basic units of life. A characteristic of living things.
reproduction
Ability to generate offspring
scanning electron microscope (SEM)
expensive, only view dead organisms, beam of electrons scan the surface.
transmission electron microscope (TEM)
Beam of electrons passes through a thin section of the specimen.
field of view (FOV)
The portion of an object that is visible through a hand lens or other viewing device.
micrometer
one millionth of a meter
nanometer
one billionth of a meter
Convert 17 m to micrometers
17,000,000
Convert 17 m to millimeters
17000
hypothesis
A proposed, scientifically testable explanation for an observed phenomenon.
Convert 17 m to kilometers
0.017

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