Procedures

What is the first step in the scientific method?

• Formulating a hypothesis

• Conducting an experiment

• Making an observation

• Analyzing data

Which of the following procedures is used to separate a mixture of sand and salt?

• Filtration

• Evaporation

• Distillation

• Chromatography

In a controlled experiment, which variable is changed to test its effects?

• Dependent variable

• Independent variable

• Controlled variable

• Extraneous variable

What is the purpose of a control group in an experiment?

• To provide a standard for comparison

• To increase the sample size

• To ensure the experiment is ethical

• To manipulate the independent variable

Which procedure is used to determine the pH of a solution?

• Titration

• Filtration

• Centrifugation

• Chromatography

What is the main purpose of peer review in scientific research?

• To ensure accuracy and validity

• To increase publication speed

• To promote collaboration

• To reduce research costs

Which of the following is a qualitative observation?

• The solution is blue

• The mass is 5 grams

• The temperature is 25°C

• The length is 10 cm

What is the procedure called when a scientist repeats an experiment to verify results?

• Replication

• Duplication

• Validation

• Confirmation

Which procedure is used to measure the volume of an irregularly shaped object?

• Water displacement

• Using a ruler

• Using a protractor

• Using a balance

What is the role of a hypothesis in scientific research?

• To provide a testable explanation

• To summarize the results

• To describe the methodology

• To list the materials needed

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4