ATI TEAS 7
ATI TEAS 7 Version 1 Science Questions
Extract:
Question 1 of 5
Which of the following properties of water explains its solvent abilities for certain substances?
Correct Answer: B
Rationale: The correct answer is B: Polarity. Water's polarity, resulting from its unequal sharing of electrons and the formation of hydrogen bonds, makes it an excellent solvent. The polar nature of water allows it to interact with and dissolve substances that have charges or partial charges, aiding in their breakdown at a molecular level. Choices A, C, and D are not directly associated with water's solvent capabilities. High specific heat (Choice A) refers to water's ability to resist temperature changes, volume (Choice C) is the amount of space occupied by water, and high surface tension (Choice D) pertains to water's cohesive properties.
Extract:
Question 2 of 5
In light of the recent discovery that worm infection can relieve certain autoimmune disorders, how should the hypothesis be modified regarding parasitic infections?
Correct Answer: A
Rationale: The recent discovery that worm infection can relieve certain autoimmune disorders suggests a need to modify the hypothesis. Instead of viewing all parasitic infections as harmful, the new information indicates that worm infection can actually reduce certain autoimmune disorders. This challenges the previous belief and highlights a potential therapeutic benefit. Choices B, C, and D do not reflect the new understanding and should be eliminated. Therefore, option A, 'Worm infection reduces certain autoimmune disorders,' aligns with the updated hypothesis based on the recent discovery and is the correct answer.
Question 3 of 5
A group of students performed an experiment to test terminal velocity, which is the greatest speed obtained by a falling object. The students dropped different numbers of coffee filters and measured the resulting terminal velocity. Which of the following conclusions is supported by the data in the following data table?
Correct Answer: D
Rationale: The correct conclusion supported by the data is that heavier objects fall faster than lighter objects. Heavier objects experience a greater gravitational force, causing them to fall faster. This aligns with the concept of terminal velocity, which is the maximum speed a falling object can reach when the force of gravity is balanced by air resistance. Due to the stronger pull of gravity on heavier objects, they can overcome air resistance more effectively and reach terminal velocity faster compared to lighter objects.
Question 4 of 5
What is the primary outcome of using a catalyst in a chemical reaction?
Correct Answer: C
Rationale: The primary outcome of using a catalyst in a chemical reaction is to accelerate the reaction and complete it in a shorter timeframe. A catalyst functions by lowering the activation energy required for the reaction to occur, thereby speeding up the process without altering the amount of heat energy released, the yield of the product, or the nature of the final product. This acceleration makes the reaction more efficient by facilitating the conversion of reactants to products in a more rapid manner.
Question 5 of 5
Which of the following chemicals is released by one type of immune cell to directly activate another immune cell?
Correct Answer: B
Rationale: The correct answer is B: cytokines. Cytokines are signaling molecules released by immune cells to regulate the immune response. They play a crucial role in coordinating and communicating between different immune cells. By releasing cytokines, immune cells can directly activate other immune cells, enhancing the immune response. Lysozymes are enzymes that break down bacterial cell walls, perforin is a protein involved in cell-mediated immune responses, and granzymes are enzymes that induce apoptosis in target cells, mainly used by cytotoxic T cells and natural killer cells, not for directly activating other immune cells.