Chemistry - 1st Semester

What is the purpose of the scientific method?

• To observe natural phenomena

• To solve problems in an organized way

• To differentiate between theories and laws

• To conduct experiments and analyze results

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scientific method

What is the first step of the scientific method?

• Formulating a hypothesis

• Conducting experiments

• Observing and defining the problem

• Analyzing the results

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scientific method

What is a hypothesis?

• An educated guess that is testable and measurable

• A proven scientific theory

• A natural phenomenon

• An experimental conclusion

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scientific method

What is a scientific theory?

• A hypothesis supported by experimental evidence

• A natural phenomenon tested over a long period of time

• An organized approach to solve problems

• A description of a scientific law

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scientific method

What is a scientific law?

• A hypothesis supported by experimental evidence

• A natural phenomenon tested over a long period of time

• An organized approach to solve problems

• A description of a natural phenomenon

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scientific method

What is dimensional analysis?

• A method used to convert units

• A method used to measure length, mass, and volume

• A method used to solve algebraic equations

• A method used to analyze chemical reactions

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dimensional analysis

Which units are used in the SI unit system for length, mass, and volume?

• Length: centimeters, Mass: grams, Volume: liters

• Length: meters, Mass: kilograms, Volume: liters

• Length: inches, Mass: pounds, Volume: gallons

• Length: millimeters, Mass: milligrams, Volume: milliliters

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dimensional analysis

What is the conversion factor for 60 minutes to 1 hour?

• 1 minute = 60 hours

• 1 hour = 60 seconds

• 1 minute = 1 hour

• 1 hour = 60 minutes

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dimensional analysis

How many centimeters are in 2.7 meters?

• 27 cm

• 270 cm

• 2.7 cm

• 0.027 cm

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dimensional analysis

How many feet are equal to 54.7 inches?

• 5.47 ft

• 547 ft

• 4.56 ft

• 45.7 ft

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dimensional analysis