Chem 20-30

What is an observation?

• An indirect form of knowledge obtained from the 5 senses

• An indirect form of knowledge obtain from ideas that builds on a concept

• A direct form of knowledge obtained from the 5 senses

• A direct form of knowledge obtained from ideas that builds on a concept

Select the ones that are observations

• Carbon burns with a yellow flame

• Carbon atoms react with oxygen molecules to produce carbon dioxide molecules

• Global warming is caused by carbon dioxide

What is an interpretation?

• A direct form of knowledge obtained from the 5 senses

• A direct form of knowledge obtained from observation

• An indirect form of knowledge that builds on a concept or an experience to further describe an observation

• An indirect form of knowledge that builds on a concept or an experience to further describe an idea

What is empirical knowledge?

• unobservable knowledge

• Observable knowledge

• The characteristics of chemical changes in a substance

• The changes in physical changes in a substance

What is theoretical knowledge?

• Explains/describes scientific interpretations in terms of ideas and is observable

• Explains/describes scientific observations in terms of ideas and is not observable

• Explains/describes scientific observations in terms of scientific law and is not observable

• Explains/describes scientific observations in terms of scientific law and is observable

Which one is a form of empirical knowledge? Pick 3

• Graphite is a black powdery substance

• Elements are defined as substances that cannot be decomposed by heat or electricity

• The mass of products in a chemical reaction is always equal to the mass of reactants

• I believe that, in this case, the temperature will affect the rate of reaction

• Based upon the limited evidence available, the metals are all bendable

Which statement about carbon is theoretical?

• Carbon in the form of graphite conducts electricity whereas carbon in the form of a diamond does not

• Graphite contains some loosely held electrons, whereas the electrons in a diamond are all tightly bound in the atoms

Is scientific knowledge classified as empirical or theoretical?

• Empirical knowledge

• Theoretical knowledge

• Both