Introduction to Chemistry and the Scientific Method

What is the primary focus of chemistry as a science?

• The study of living organisms

• The study of celestial bodies

• The history of scientific discoveries

• The composition and properties of substances

How are molecules different from atoms?

• Molecules are two or more atoms joined together

• Molecules are single atoms

• Molecules are not part of matter

• Molecules are smaller than atoms

Why is carbon monoxide considered dangerous?

• It is a flammable gas

• It binds to hemoglobin more effectively than oxygen

• It has a pleasant smell

• It is a visible gas

What role does hemoglobin play in the human body?

• It transports oxygen

• It stores energy

• It fights infections

• It digests food

What is a key characteristic of a good scientific hypothesis?

• It is a proven fact

• It is falsifiable

• It is based on personal beliefs

• It is always correct

What is the primary purpose of scientific experiments?

• To test hypotheses and generate observations

• To prove a hypothesis

• To confirm existing theories

• To create new scientific laws

How do scientific laws differ from theories?

• Laws explain why phenomena occur

• Theories summarize observations

• Laws describe what happens, theories explain why

• Theories are less supported by evidence

What is the relationship between scientific theories and evidence?

• Theories are not related to evidence

• Theories are always proven facts

• Theories are supported by strong experimental evidence

• Theories are guesses without evidence

What is the significance of the statement 'just a theory' in science?

• It suggests the theory is a hypothesis

• It means the theory is incorrect

• It shows a misunderstanding of scientific theories

• It indicates a lack of evidence

What is the best way to improve a scientific theory?

• By making it a law

• By proving it wrong

• By developing a better theory

• By ignoring new evidence