at which step in the scientific method might a scientist create a model
Logo

Nursing Elites

ATI TEAS 7

ATI TEAS 7 Science

1. At which step in the scientific method might a scientist create a model?

Correct answer: A

Rationale: In the scientific method, scientists often create models during the hypothesis stage. Creating models at this stage helps visualize or simulate ideas before proceeding to experimentation and data analysis. Models are valuable tools that allow scientists to conceptualize and test their ideas before conducting experiments to gather data and draw conclusions. Therefore, the correct answer is A. Choice B, data analysis, occurs after experiments have been conducted and data has been collected, making it an incorrect choice. Choice C, experimentation, involves conducting tests and observations based on the hypothesis, but the creation of models typically happens before this stage. Choice D, conclusion, is the final step where scientists interpret the results and draw implications, making it an inappropriate step for creating a model.

2. Ectopic pregnancy is a serious condition that occurs when a fertilized egg implants outside the uterus. What is the most common location for an ectopic pregnancy?

Correct answer: B

Rationale: The most common location for an ectopic pregnancy is the fallopian tube. This occurs when the fertilized egg implants and grows outside the uterus, typically in the fallopian tube. Ectopic pregnancies in other locations such as the ovary, cervix, or vagina are much rarer. The fallopian tube is the correct answer because it is the site where the fertilized egg may get stuck during its journey to the uterus, leading to implantation and growth outside the uterus. The ovary is not a common site for ectopic pregnancy, and implantation there can be life-threatening due to the risk of severe bleeding. The cervix and vagina are not typical sites for implantation of a fertilized egg, making them less likely locations for an ectopic pregnancy.

3. Which element has the same number of protons and neutrons?

Correct answer: D

Rationale: The correct answer is Helium (He). Helium has an atomic number of 2, meaning it has 2 protons. It also has 2 neutrons, which gives it a total mass number of 4. Therefore, Helium is an example of an element with an equal number of protons and neutrons. Choice A (Carbon) has 6 protons and usually has more neutrons than protons. Choice B (Oxygen) has 8 protons and 8 neutrons, so the numbers are not equal. Choice C (Lithium) has 3 protons and usually has more neutrons than protons, so it does not fit the criteria of having the same number of protons and neutrons.

4. A botanist wants to determine if environmental temperature affects root growth. What is the independent variable in this study?

Correct answer: A

Rationale: The correct answer is 'Temperature.' In an experiment, the independent variable is the factor that is deliberately manipulated or changed by the researcher. In this study, the botanist is specifically investigating how environmental temperature affects root growth, making temperature the independent variable. Choice B, 'Seedlings,' and Choice C, 'Light,' are not the independent variables in this context as they are not the factors being intentionally changed or manipulated. Choice D, 'Root length,' is the dependent variable, as it is the outcome that is being measured or observed in response to the changes in the independent variable, temperature.

5. Which of the following is a unit of work and energy?

Correct answer: B

Rationale: The correct answer is 'B: Kilowatt-hour (kWh).' The kilowatt-hour is a unit commonly used to measure electricity consumption, representing energy usage over time. A Pascal (Pa) is a unit of pressure, Coulomb (C) is a unit of electric charge, and Tesla (T) is a unit of magnetic flux density. Therefore, the kilowatt-hour is the appropriate unit for measuring work and energy in this context.

Similar Questions

Which of the following phases of mitosis is characterized by the separation of sister chromatids and their movement to opposite poles?
Melanin, the pigment responsible for skin color, is produced by
Which state of matter has particles that are highly organized in a fixed pattern and vibrate in place?
Lymph nodes, found along lymphatic vessels, are important for:
Where is the ball-and-socket joint, allowing a wide range of motion, found?

Access More Features

ATI TEAS Premium Plus
$149.99/ 90 days

  • Actual ATI TEAS 7 Questions
  • 3,000 questions with answers
  • 90 days access

ATI TEAS Basic
$99/ 30 days

  • 3,000 Questions with answers
  • 30 days access

Other Courses