Chapter 1 De Mesa: The Scientific Method
experiment
a procedure that yields new information that is used to show whether a prediction is supported or not
Chemistry
The science that deals with the materials of the universe and the changes that these materials undergo; often called the central science
A. a law
The statement "gasses are compressible" is an example of A. a law B. a theory C. a hypothesis D. an observation
A. a law
The statement "the pressure and volume of a gas is inversely proportional when its temperature is kept constant" is an example of A. a law B. a theory C. a hypothesis D. an observation
B. a theory
The statement "the universe originated billions of years ago from an explosion of a relatively minuscule amount of matter at high temperatures and pressure" is an example of A. a law B. a theory C. an observation D. none of the above
Qualitative
data describing a quality that does not require a number
Quantitative
data measured using a number
Observation
qualitative or quantitative data; limited to individual items
Theory
similar to a hypothesis but based on a more thorough study; a unifying principle that explains the body of laws and facts based on them; infallible; the WHY behind the law and its observations
gravity
this is a well known example of a theory
theory and hypothesis
IF THESE TWO PARTS OF THE SCIENTIFIC METHOD ARE TOGETHER-NEITHER ARE THE ANSWER
False
True/False: Once a theory has been made it cannot be changed
False
True/False: What goes up must come down is an example of an observation.
False
True/False: the statement "matter is neither created nor destroyed in a chemical reaction" is an example of a theory
C. law
When a compound called an acid is mixed with a compound called a base, a reaction always occurs. Thus, the statement, "acids react with bases" is an example of a A. theory B. observation C. law D. hypothesis
A. the book is 5 pounds
Which of the following is NOT an example of a qualitative observation? A. the book is 5 pounds B. it is cold outside C. her skin is dry D. the light is bright
B. all gasses are compressible
Which of the following is NOT an observation? A. helium gas is compressible B. all gasses are compressible C. oxygen gas is compressible D. nitrogen gas is compressible
B. a hypothesis
Which of the following is a possible explanation for a set of observations? A. a measurement B. a hypothesis C. an experiment d. a law
C. a theory
Which of the following is a probable explanation for a set of observations or a set of tested hypothesis? A. an observation B. a measurement C. a theory D. an experiment
Law
a statement made after testing predictions that generalize WHAT the behavior of nature is; states, identifies, or describes the relationship among observable phenomena key words for identifying this part of the scientific method include: equals and proportional key word for this: always
Hypothesis
a tentative explanation of observations/laws or prediction that can be tested by experimentation; an educated guess key words for identifying this part of the scientific method include: if, then, may, or might
