chemistry h - ch 1 vocab

applied research

researched undertaken to solve a problem

chemical

any substance that has a definite composition

chemistry

the study of matter and the changes that it undergoes

chlorofluorocarbons

man-made chemicals containing chlorine, fluorine, and carbon

conclusion

judgement based on the information obtained

control

a standard for comparison

dependent variable

its values changes in response to a change in the independent variable

experiment

a set of controlled observations that test the hypothesis

hypothesis

a tentative explanation for what has been observed

independent variable

a variable you can change

mass

a measurement that reflects the amount of matter

matter

anything that has mass and takes up space

model

a visual, verbal, or mathematical explanation of experimental data.

observation

the act of gathering data

ozone

a substance that consists of three particles of oxygen

research

gathering information about a certain topic or problem

qualitative data

information that describes color, odor, shape, or some other physical characteristic

quantitative data

numerical information

scientific law

a rule that goes along with a relationship in nature

scientific method

a systematic approach used in a scientific study.

technology

the practical use of scientific information

theory

an explanation that has been supported by many experiments

weight

a measure not only of the amount of matter but also of the effect of Earth’s gravitational pull on the matter.