Midterm (Science)
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Created by:
mmctaggart15 on January 11, 2012
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23 terms
Terms | Definitions |
|---|---|
 heterogenous | a mixture in which substances aren't evenly distributed |
| homogenous | a mixture in which the substances are evenly distrbuted |
| physical property | strength, magnetism, conductivity, malleability, ductility, durability, flexible, and solubility |
| Density | D=Mass (grams)/Volume (in cm3) |
| Chemical property | reactivity, flammability, combustibility |
| sublimation | a change a state from a solid to a gas |
| pressure | the amount of force/area |
| Archimedes Principle | Buoyant Force= the weight of displaced fluid |
| Pascal's principle | F1/A1=F2/A2 works with pistons -if the pressure in a container is increased at one point, the pressure increases at any point by the same amount |
| Bernoulli's principle | as the speed of the a fluid increases pressure decreases |
| Pure science | studying and observing the nature of things. learning more by doing experiments |
| technology | application of science for practical uses |
| scientific law | describes something in nature that can be tested by repeated experiments |
| theory | explains howa process takes place, they can be supported but not proven true |
| qualitative | observation that involves descriptive words |
| quantitative | observation that involves numbers and units |
| conclusion | the end of scientific method when you decide if your hypothesis is proven or not. You have to consider the limitations of the experiment and make inferences |
| inference | a logical conclusion based on observations and data |
| SI Units | length- meter mass- kilogram time- second temperature- kelvin |
| mass | the amount of matter in an object |
| weight | a measure of the gravitational force exerted on an object |
| Democritus | -believed that atoms were unable able to be divided -the movements in atoms caused the changed in matter |
| Bohr | a Danish physicist who suggested that the energy of each electron is related to the electron's path around the nucleus. His model was like a hotel |
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