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Chemistry Ch.2 vocab

Scientific method Logical approach to solving problems that lend themselves to investigation
System Specific portion of matter in given region if space that has been selected for study during an experiment
Hypothesis Testable statement as basis for predictions and further experiments
Model Explanation how phenomena occurs and how data or events are related
Theory Broad generalization that explains a body of known facts or phenomena
Quantity Sehing that has magnitude size of amount
SI 7 base units
Weight Measure of traditional pull in matter
Derived unit Square meter (area) and cabin meter(volume)
Volume Amount of space occupied by object
Density Ratio of mass to volume
Conversion factor Used to convert from one until to another
Dimensional analysis Mathematical technique that allows use units to solve problems involving measurements
Accuracy Closeness of measurements to correct of accepted value
Precision Closeness of values for a set of measurement
Percentage error Difference between experimental and accepted value that is divided by accepted value and then multiplied by 100
Significant figures In number consists of all digits known with certainty plus one final digit which is uncertain
Scientific notation Numbers written in Mx10^n
Directly proportional If dividing quantity by another that yields a constant value
Inversely proportional 2 quantities product has a constant value
Created by: DGW



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