Chapter 1 - Chemistry Honors Flashcards
scientific method
A systematic approach used in all scientific study
matter
Anything that takes up space and has mass
ozone
A chemical that protects organisms from UV radiation
chemical
Any substance with a definite composition
model
A visual, verbal, or mathematical explanation of how things occur
chemistry
The study of matter and the changes it undergoes
observation
The act of gathering information
conclusion
A judgement based on the information obtained during an experiment
technology
The practical use of scientific research
chlorofluorocarbon
A chemical made up of chlorine, fluorine, and carbon
Qualitative data
The certain quality of a substance for example, colour.
Quantitative data
Made by measurement that involves a number for example, length, mass, volume, etc.
Hypothesis
An idea as to why something happens without evidence
Theory
Explains why nature behaves the way it does
Independent variable
the variable changed or controlled by the experiment, x axis
Dependent Variable
Value depends on value of independent variable, y axis
- Which of the following is NOT matter?
a. atoms b. ultraviolet radiation c. air d. the Sun
b. ultraviolet radiation
- At the end of an experiment, the scientist forms a conclusion based on the
a. variable. b. scientific law. c. data obtained. d. control.
c. data obtained.
- Which of the following is a set of controlled observations that tests a hypothesis?
a. mass b. experiment c. weight d. constant
b. experiment
- The branch of chemistry that focuses on carbon-containing chemicals is called
a. analytical chemistry. b. inorganic chemistry. c. biochemistry. d. organic chemistry.
d. organic chemistry.
Pure research
Comes up with theories as to how nature works
Applied Research
Use theory to make a product
