| Question |
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| Answer |
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| The goal of science |
To investigate and understand nature, to explain events in nature, and to use those explanations to make useful predictions. |
| Science |
An organized wayi of using evdience to learn about the natural world. |
| Observation |
Involves using one or more of the senses to gather information. |
| Info from observation |
data |
| Quantitative observations |
numbers |
| Qualitative observations |
Characteristics that cannot be easily measured or counted. |
| Inference |
a logical interpretation based on prior knowledge and experience |
| Hypothesis |
A possible explanation for a set of observations or an answer to a scientific question. |
| A hypothesis must be |
testable |
| Spontaneous generation |
The idea that life can arise from nonliving matter |
| Redi's hypothesis |
Flies produced maggots |
| An experiment should only test... |
one variable at a time |
| Variables |
factors in an experiment that can change |
| Controlled experiment |
only one variable is changed at a time |
| MV |
purposely changed |
| RV |
changes because of the mv and is measured |
| Why can experimental results be reproduced? |
Scientists believe that nature behaves in a consistent manner |
| data from a controlled experiment is used |
to evalutate the hypothesis and to draw a conclusion |
| Leeuwenhoek |
discovered microscopic life in rainwater, pondwater, and dust |
| Needham |
concluded spontaneous generation did occur because after boiling gravy, more microrganisms came into the gravy |
| Spallazani |
Did Needham's experiment with an open and sealed flask |
| Pasteur |
settled the argument with the flask with the curved neck |
| Theory |
A hypothesis that is extremely well supported |
| Biology |
Living world science |
| Cell |
Collection of living matter enclosed by a barrier that separates the cell from its surroundings. |
| Smallest unit that can be considered alive |
yup |
| Multicellular organism |
contains trillions of cells |
| Living things are based on a universal |
genetic code (DNA) |
| An organinism needs a constant supply of materials |
to grow, develop, and reproduce |
| Homeostasis |
process by which organisms keep their internal conditions relatively stable. |
| Evolve |
change over time |
| ethologist |
studies animal behavior |
| largest level of bio study |
biosphere |
| Why do scientists need a common measurement system |
to replicate each others experiments |
| Metric system |
system scientists use - decimal system of measurement whose units are based on certain physical standards and based on multiples of ten |
| Microscopes |
produce magnified images |
| Compound light microscope |
allows light to pass through a specimen and uses two lenses to form an image |
| Chemical stains |
highlight specific structures in the cell |
| 2 types of electron microscopes |
TEM and SEM |
| TEM |
shines a beam of electrons through a specimen |
| SEM |
runs a beam back and forth which "scans" the specimen |
| cell culture |
group of cells grown in a nutrient solution from a signel original cell |
| cell fractionation |
separates on part of a cell from the rest |
| follow instructions |
(blank) |
CADD 2 Honors
