-Unit 0 Exam Practice

Which of the following is a fundamental principle of lab safety?

• Always work alone in the lab.

• Ignore safety signs and labels.

• Wear appropriate personal protective equipment (PPE).

• Eat and drink in the laboratory.

When conducting a scientific experiment, which step comes first?

• Formulating a hypothesis.

• Collecting data.

• Analyzing results.

• Drawing conclusions.

Which of the following statements describes the purpose of the scientific method?

• To prove theories correct without evidence.

• To systematically investigate and explain natural phenomena.

• To disregard prior research and start fresh every time.

• To record data without analysis.

Tags

NGSS.MS-LS1-1

In the context of the Claim-Evidence-Reasoning (CER) framework, what is the 'Claim'?

• A. A statement or conclusion that answers the original question.

• B. Data or observations that support the claim.

• C. The justification that links the evidence to the claim.

• D. An alternative hypothesis.

Tags

NGSS.MS-LS1-4

NGSS.MS-PS3-5

What is the primary concern when dealing with chemicals in the lab?

• A. Aesthetic appearance of chemicals.

• B. Cost of the chemicals.

• C. Availability of large quantities.

• D. Safety and proper handling.

Tags

NGSS.MS-ETS1-1

According to lab safety rules, what should you do if you spill a chemical on your skin?

• Ignore it and continue working.

• Rinse the affected area with water immediately.

• Wipe it off with a cloth.

• Use a concentrated acid to neutralize it.

Which of the following best defines a hypothesis?

• A proven scientific fact.

• A summarization of an experiment's results.

• A predictive statement based on observations that can be tested.

• A random guess without basis.

What is the most important piece of lab equipment for protecting your eyes?

• Safety goggles.

• Lab coat.

• Gloves.

• Face mask.

In an experiment, what role does 'evidence' play in the CER framework?

• It is the question that initiates the investigation.

• It provides the data and information that support the claim.

• It is the inference that connects data to the claim.

• It offers alternative explanations to the claim.

Tags

NGSS.MS-LS2-4

NGSS.MS-PS3-5

During a scientific experiment, quantitative data refers to:

• Descriptive observations without numbers.

• Theoretical background information.

• Numerical measurements and data.

• Subjective opinions.

Tags

NGSS.MS-PS3-1