Class 9 Physics Chapter 9 MCQs Federal Board
Class 9 Physics Chapter 9 MCQs Federal Board
Tick the correct option.
1) What is the best definition of the term ” theory, ” as it is used in science?
A) A theory is a guess or hunch about something that has occurred in nature.
B) A theory is a comprehensive set of ideas explaining a phenomenon in nature.
C) A theory is based on verifiable laws and can be proven true.
D) A theory is a hypothesis that uses laws and observations to make an assumption.
Correct option is (b)
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2) Which statement below correctly identifies the difference between laws and theories?
A) Laws describe phenomena, while theories explain why phenomena exit.
B) Laws are a statement of fact, while theories are a statement of opinion.
C) Laws explain why phenomena exit, while theories explain how.
D) Laws are a prediction of phenomena, while theories are an explanation.
Correct option is (a)
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3) Why do scientists develop a hypothesis before conducting research?
A) It gives them direction on how to interpret the results of their research.
B) It helps to predict outcomes and define the parameters of the research.
C) Hypothesis give the researcher an outcome to shape their work around.
D) Hypothesis help a researcher decide which observation to record and which to ignore.
Correct option is (b)
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4) The branch of physics that is most important when studying how glasses help people see:
A) Thermodynamics
B) Electromagnetism
C) Mechanics
D) Optics
Correct option is (d)
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5) When studying how air conditioners cool your house, then it is:
A) Thermodynamics
B) Electromagnetism
C) Nuclear physics
D) Optics
Correct option is (a)
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6) The branch of physics that deals with the particles such as neutrons and protons:
A) Solid State Physics
B) Plasma physics
C) Electricity
D) Nuclear physics
Correct option is (d)
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7) Which branch of science plays an important role in engineering?
A) Biology
B) Chemistry
C) Physics
D) Genetics
Correct option is (c)
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8) Physics is one of the branches of:
A) Physical sciences
B) Biological sciences
C) Social science
D) Life science
Correct option is (a)
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