which of the following is the first step of the scientific method

ATI TEAS 7

TEAS 7 Science Practice Test

1. What is the initial step of the scientific method?

A. construct a hypothesis
B. make observations
C. analyze data
D. form a question

Correct answer: B

Rationale: The first step of the scientific method is to make observations. This involves collecting data and information about a specific phenomenon or problem. Observations serve as the basis for developing a question to be explored further. Forming a hypothesis (Choice A) comes after making observations, as the hypothesis is an educated guess to explain the observations. Analyzing data (Choice C) occurs later in the scientific method after data has been collected and experiments conducted. Forming a question (Choice D) is a crucial step but typically follows observations in the scientific process.

2. Reread the following sentence from the passage: 'Don't hit me with arguments about greater freedom for workers.' Which of the following would be a more formal way to rewrite the sentence?

A. I disagree with the argument about contract workers having greater freedom.
B. Stop telling me that freelancers have more freedom!
C. Is there actually freedom for workers?
D. I've already heard.

Correct answer: A

Rationale: Choice A, 'I disagree with the argument about contract workers having greater freedom,' is the correct answer. This sentence rephrases the original statement in a more formal and respectful tone, which is suitable for formal writing. Choice B is too direct and lacks formality. Choice C does not address the argument directly and poses a question instead of providing a formal statement. Choice D is dismissive and does not offer a formal rewrite of the original sentence.

3. What is the most effective way to combine the following sentences? 1. The colonists refused to buy stamps. 2. They were determined to get the Stamp Act repealed.

A. The colonists refused to buy stamps and they were determined to get the Stamp Act repealed.
B. The colonists refused to buy stamps, and they were determined to get the Stamp Act repealed.
C. The colonists refused to buy stamps, and were determined to get the Stamp Act repealed.
D. The colonists refused to buy stamps, were determined to get the Stamp Act repealed.

Correct answer: B

Rationale: The conjunction 'and' is used to connect the two independent clauses in the most effective and grammatically correct way. This choice maintains the clarity of the sentence and the relationship between the two ideas. Choice A is incorrect as it lacks the necessary conjunction to properly connect the two independent clauses. Choice C is incorrect as it misses the subject 'they' before 'were determined.' Choice D is incorrect as it lacks the necessary coordinating conjunction 'and' before 'were determined,' resulting in a run-on sentence.

4. Adrian measures the circumference of a circular picture frame with a radius of 3 inches. Which of the following is the best estimate for the circumference of the frame?

A. 12 inches
B. 16 inches
C. 18 inches
D. 24 inches

Correct answer: C

Rationale: To calculate the circumference of a circle, use the formula 2πr, where r is the radius. In this case, with a radius of 3 inches, the estimated circumference would be 2 x π x 3 = 6π ≈ 18.85 inches. Therefore, the best estimate for the circumference of the frame is 18 inches (Choice C). Choice A (12 inches) is too small as it corresponds to the diameter rather than the circumference. Choice B (16 inches) and Choice D (24 inches) are also incorrect as they do not reflect the accurate calculation based on the given radius.

5. How many centimeters are in 1 inch?

A. 2.54 cm
B. 3 cm
C. 2 cm
D. 1 cm

Correct answer: A

Rationale: The correct answer is A: 2.54 cm. One inch is equivalent to 2.54 centimeters. This conversion factor is commonly used when converting measurements between the metric and imperial systems. Choice B (3 cm) is incorrect as it is not the accurate conversion factor for 1 inch. Choice C (2 cm) is also incorrect as it does not reflect the correct conversion. Choice D (1 cm) is incorrect as it inaccurately states the conversion value for 1 inch.