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| to investigate and understand the natural world, to explain events int he natural world, and to use those explanations to make useful predictions |
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| what scientists start with. use of one or more of the senses= sight, hearing, touch, smell, and sometimes taste- to gather info |
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organized way of using evidence to learn about the natural world; body of knowledge that scientists have built up after years of using this process |
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| evidence; info gathered from observations |
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| logical interpretation based on prior knowledge and experience |
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| possible explanation for a set of observations or possible answer to a specific question |
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1. observe
2. ask a question
3. form hypothesis
4. set up controlled experiment
5. record data and analyze results
6. draw conclusion |
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| as evidence from numerous investigations build up, a particular hypothesis may become so well supported that scientists consider it a theory . well tested explanation that unifies a broad range of observations |
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- are made up of units called cells
-reproduce
- are based on a universal genetic code
- grow and develop
- obtain and use amterials and energy
- respond to their environment
- maintain a stable internal environment
- taken as a group, living things change over time |
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| only one variable changes at a time |
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| variable that is deliberatly changed |
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| variable that is observed and that changes in response to manipulated variable |
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| a collection of living matter enclosed by a barrier that seperates the cell form its surroundings |
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| cells from two diff parents unite to produce the first cell of a new organism |
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| new organism has a single parent, usually that divides |
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| combo of chemical reactions thru which an organism builds up or breaks down materials as it carries out its life processes |
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| signal to which an organism responds |
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| process by which organisms maintain their internal environment |
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| ability of a group or organisms to change over time |
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| levels at which life can be studied |
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- molecule
- cell
- organism
- species
- population
- community
- biosphere |
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decimal system of measurement whose units are based on a certain physical standard and scaled on multiples of 10 (what most scinetsists use)
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produce magnified images by focusing visible light rays. allow light to pass thru the specimen and use 2 lenses to form image
make it possible to study dead organisms and their parts or tiny organisms and cells that are still alive |
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produce magnified images by focusing beams of electrons. much more detailed than light
transmission electron microscopes and scanning electron microscopes
cells have to be dead, preserved, and dehydrated to see cuz it scans |
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| the cell is able to reproduce so that a group of cells, called cell culture, develops from the single original cell |
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| a technique to seperate the different parts of a cell |
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*length
1 meter= 100 centimeters
1 meter= 1000 millimeters
1000 meters= 1 kilometer
*volume
1 liter= 1000 milliliters
1 liter= 1000 cubic centimeters
*mass
1 kilogram= 1000 grams
1 gram= 1000 milligrams
1000 kilograms= 1 metric ton
*temperature
0°C= freezing point of water
100°C= boiling point of water |
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