Upgrade to remove ads
Only $35.99/year

Chemistry -Vocabulary 1

Terms in this set (16)

Accuracy (Ex: The accuracy of the measurement was challenged by his partner.)
The exactness (correctness) of a measurement.
Precision (Ex: She spaced the seating with precision.)
The repeatability of a group of measurements
Percent Error (Ex: There was a 5 percent error on each of the estimated results.)
Calculated value that describes the accuracy of collected data.
significant figures (Ex: Since the value wasn't a zero, it was considered a significant figure.)
The digits in a measurement that can be determined through measurement with some degree of accuracy based on the measuring tool being used.
independent variable (Ex: The timing was the independent variable in the experiment.)
Variable that affects the outcome of an experiment.
dependent variable (Ex: Because the timing of the experiment was off, the dependent variable changed.)
Variable whose value depends on that of another variable.
Hypothesis (Ex: The Lab results proved their hypothesis correct.)
A proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Theory (Ex: The theory had great scientific value.)
Statement based on repeated experiments of observations.
Law (Ex: Isaac Newton came up with multiple scientific laws.)
System of ideas intended to explain something based on scientific observations.
derived unit (Ex: The knot is the derived unit of speed.)
Unit generated from a calculation of other base units.
measured unit (Ex: They used a ruler to find that the water had risen 2 inches.)
Value obtained during experimentation using scientific equipment.
estimated digit (Ex: The stick was at least a foot long, but we found the estimated digit to be about 3 inches, making the stick about 1'3".)
The last digit in a measurement that is one place past the smallest division marked on your laboratory tool.
qualitative observation (Ex: She thought the flower was nice because of her qualitative observation of the rose.)
An observation based on the information gathered using the 5 senses.
quantitative observation (Ex: His quantitative observation was that he is tall because he was 6 feet in height.)
An observation based on a numerical measurement which includes a number and a unit.
physical change (Ex: Pouring the alcohol causes a physical change of the liquid form.)
Change affecting the form of a chemical substance, but not its chemical composition.