Scientific Method & Chemistry of Life Review

What is a hypothesis in the context of the scientific method?

• A) A standard against which other conditions can be compared in a scientific experiment

• B) A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation

• C) The observed variable in an experiment or study whose changes are determined by the presence or degree of one or more independent variables

• D) A manipulated variable in an experiment or study whose presence or degree determines the change in the dependent variable

What is the role of the independent variable in an experiment?

• A) It is the variable that is observed to see how it changes with the experiment

• B) It is the variable that remains constant throughout the experiment

• C) It is the variable that is manipulated to determine the change in the dependent variable

• D) It is the error that occurs due to lack of calibration

Which of the following is a source of error in experiments that involves the size or randomness of the sample?

• A) Instrumental error

• B) Personal error

• C) Sampling error

• D) Replication error

What is meant by 'control' in a scientific experiment?

• A) The variable that is manipulated in an experiment

• B) The process of analyzing results and drawing conclusions

• C) A standard against which other conditions can be compared

• D) An error due to lack of consistency and accuracy

What should a scientist do if the hypothesis is found to be false or partially true after testing with an experiment?

• A) Report the results immediately

• B) Redesign the experiment

• C) Think and try again

• D) Draw a conclusion and end the study

Which statement best describes a hypothesis?

• The facts collected from an experiment are written in the form of a hypothesis.

• A hypothesis is the correct answer to a scientific question.

• A hypothesis is a possible, testable explanation for a scientific question.

• A hypothesis is the process of making careful observations.

Place the steps of the scientific method in the correct order from beginning (top) to end (bottom).

• Make an observation, Ask a scientific question, Create a hypothesis, Test the hypothesis, Refine/iterate on research

• Ask a scientific question, Make an observation, Create a hypothesis, Refine/iterate on research, Test the hypothesis

• Create a hypothesis, Make an observation, Ask a scientific question, Test the hypothesis, Refine/iterate on research

¿Qué tipo de molécula orgánica es conocida por ser una fuente importante de energía y está compuesta principalmente de azúcares y almidones?

• Proteínas

• Lípidos

• Carbohidratos

• Ácidos nucleicos

¿Cuál es la función principal de las proteínas según el material?

• Proporcionar energía rápida

• Almacenar energía a largo plazo

• Actuar como enzimas y componentes estructurales

• Dirigir la instrucción de las proteínas

¿Qué monómero constituye los lípidos?

• Monosacárido

• Aminoácido

• Ácido graso

• Nucleótido