ATI TEAS 7 Science

Correct Answer: D

Rationale: The correct answer is D because water's unique polarity allows it to dissolve a wide range of substances. Water's polar covalent bonds enable it to form hydrogen bonds with other molecules, facilitating dissolution. Water's ability to dissolve various substances is crucial for biological processes such as nutrient absorption and waste removal. Choice A is incorrect because water is neutral in terms of its pH, not inherently having a neutral pH. Choice B is incorrect because water actually has a high specific heat capacity, which is why it can absorb and release large amounts of heat without significant temperature changes. Choice C is incorrect because while water does have polar covalent bonds, this property alone does not fully characterize water as much as its dissolving capabilities do.

Correct Answer: D

Rationale: The correct answer is D: Dependent, y. In experimental design, the dependent variable is the variable being measured as a possible effect, and it is typically plotted on the y-axis of a graph. This variable is what researchers are observing or testing to see if it changes in response to the manipulation of the independent variable. The independent variable, on the other hand, is what is being manipulated or controlled in the experiment and is usually plotted on the x-axis. Therefore, in a standard experimental design setup, the dependent variable is represented on the y-axis to show the relationship between it and the independent variable on the x-axis. Choices A, B, and C are incorrect because they do not align with the conventional practice of plotting the dependent variable on the y-axis.

Correct Answer: C

Rationale: The primary function of the lymphatic system is to fight infection and remove excess fluid. Lymph nodes contain white blood cells that help fight pathogens. Lymphatic vessels collect excess fluid from tissues and transport it back to the bloodstream, aiding in immune response. Other choices are incorrect because A: Oxygen transport is primarily done by the circulatory system, B: Blood filtration is mainly carried out by the kidneys, and D: Hormone transport is primarily through the circulatory system.

Correct Answer: A

Rationale: Acceleration is defined as the rate of change of velocity over time. This means that acceleration measures how quickly an object's velocity is changing. By choosing answer A, "Change in velocity over time," you are correctly identifying the definition of acceleration. Choice B, "Speed in a straight line," is incorrect because speed does not take into account the change in velocity, which is vital in defining acceleration. Choice C, "Distance covered in a given time," is incorrect as it pertains to speed or distance traveled, not acceleration, which specifically relates to changes in velocity. Choice D, "Force applied to an object," is incorrect because force is a completely different concept in physics and is not directly related to the definition of acceleration.

Correct Answer: B

Rationale: Failed to generate a rationale after 5 retries.