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Physical Science chp
this is chapter 1 sec 1,2,3 (8th)
| Question | Answer |
|---|---|
| science | the knowledge obtained by observing natural events in order to discover facts that can be tested |
| technology | the application of science for practical uses |
| law | an equation or statement that predicts events under certain conditions |
| theory | system of ideas that explains related observations and is acquired through investigation |
| critical thinking | make a judgement based on fact ans asses claims critically |
| scientific methods | a series of steps followed to solve problems |
| steps of the scientific method | collect data, hypothesis, test, and state conclusion |
| variable | factor that changes the experiment in order to test a hypothesis |
| length | measure between to straight points |
| mass | measure of amount of matter |
| volume | measure of size of a region in a 3D space |
| weight | measure of gravitational pull on an object |
| precision | the exactness of a measurement |
| significant figure | a prescribed decimal place that determines the amount of rounding off to be done based on the precision of the measurement |
| accuracy | description of how close a measurement is to the true value of the quantity measured |
| scientific notation | the way of expressing a number by multiplying it by ten with the correct power |