Chemistry - Chapter 1: Intro to Chem

Chemistry

the study of matter and the changes it undergoes

Matter

anything that has mass and takes up space

Weight

how heavy something is; takes into consideration gravitational pull

Scientific Methods

Systematic approach to study science

Qualitative Data

Descriptions such as color, odor, shape or other physical characteristics

Quantitative Data

numerical descriptions such as how long or how much mass something has

Hypothesis

a tentative explanation for observations, an educated guess

Experiment

testing the hypothesis

Control

standard for comparison; measurement is kept constant to test one characteristic

Independent Variable

variable that can be changed in the experiment

Dependent Variable

variable that changes when the independent variable changes

Conclusion

judgement to create a model to explain the experimental data

Theory

explanation supported by many experiments where the outcome is predictable

Scientific Law

summary of accepted facts that is supported by many experiments