which property of a substance refers to its ability to be stretched into thin wires

ATI TEAS 7

TEAS Test 7 science quizlet

1. Which property of a substance refers to its ability to be stretched into thin wires?

A. Conductivity
B. Viscosity
C. Ductility
D. Malleability

Correct answer: C

Rationale: Ductility is the property of a substance that allows it to be stretched into thin wires without breaking. It is a crucial property for materials used in wire production. Conductivity refers to the ability of a substance to conduct electricity or heat, not to be stretched into wires. Viscosity is the measure of a fluid's resistance to flow, not its ability to be stretched. Malleability is the property of a substance that allows it to be hammered or rolled into thin sheets, not stretched into wires.

2. Which structure in the respiratory system is responsible for voice production?

A. Pharynx
B. Larynx
C. Trachea
D. Bronchi

Correct answer: B

Rationale: The correct answer is the larynx. The larynx, commonly referred to as the voice box, is responsible for voice production in the respiratory system. It contains vocal cords that vibrate to produce sound. The pharynx is a passage for food and air, the trachea is a tubular structure that carries air to and from the lungs, and the bronchi are the main airway passages in the lungs. Therefore, choices A, C, and D are incorrect as they do not play a direct role in voice production.

3. Which of the following hormones would cause skin color to become darker?

A. Follicle-stimulating
B. Growth-stimulating
C. Thyroid-stimulating
D. Melanocyte-stimulating

Correct answer: D

Rationale: The correct answer is D, Melanocyte-stimulating. Melanocyte-stimulating hormone (MSH) stimulates melanocytes in the skin to produce more melanin, leading to darker skin pigmentation. Choices A, B, and C are incorrect as Follicle-stimulating hormone (FSH) stimulates follicle growth in the reproductive system, Growth-stimulating hormone is a vague term not specific to any known hormone, and Thyroid-stimulating hormone (TSH) stimulates the thyroid gland to produce thyroid hormones, not affecting skin color pigmentation.

4. What is the normal (complete) flow of blood through the heart?

A. Right atrium â†’ lungs â†’ left atrium â†’ body
B. Left atrium â†’ left ventricle â†’ body â†’ right atrium
C. Right atrium â†’ right ventricle â†’ lungs â†’ left atrium â†’ left ventricle â†’ aorta â†’ body
D. Right ventricle â†’ left ventricle â†’ body

Correct answer: C

Rationale: The correct flow of blood through the heart starts with the right atrium receiving deoxygenated blood from the body, followed by the right ventricle pumping blood to the lungs for oxygenation. Oxygenated blood then returns to the heart through the left atrium, then passes to the left ventricle which pumps it out to the body through the aorta. This flow ensures that blood is properly oxygenated before circulating through the body. Choice A is incorrect as the blood does not go directly from the left atrium to the body, skipping the left ventricle. Choice B is incorrect as it does not follow the correct flow sequence in the heart. Choice D is incorrect as it does not include the full pathway of blood through the heart.

5. When sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl), the resulting product is:

A. Hydrogen gas and sodium chloride (NaCl)
B. Chlorine gas and sodium oxide (Na2O)
C. Sodium metal (Na) and water (H2O)
D. No reaction occurs.

Correct answer: A

Rationale: When sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl), a neutralization reaction occurs. The products of this reaction are water (H2O) and a salt, which is sodium chloride (NaCl). The chemical equation for this reaction is: NaOH + HCl -> NaCl + H2O. Choice B is incorrect because chlorine gas and sodium oxide are not the products of this reaction. Choice C is incorrect as sodium metal and water are not the products formed in this neutralization reaction. Choice D is incorrect because a reaction does occur between NaOH and HCl, resulting in the formation of NaCl and H2O. Therefore, the correct answer is A: Hydrogen gas and sodium chloride (NaCl).