ATI TEAS 7
TEAS Test 7 science
1. Where does fertilization, the fusion of sperm and egg, typically occur in the female reproductive system?
- A. Ovary
- B. Fallopian tube
- C. Uterus
- D. Vagina
Correct answer: B
Rationale: Fertilization typically occurs in the fallopian tube. After ovulation, the egg is released from the ovary and travels through the fallopian tube, where it may encounter sperm for fertilization. The fallopian tube is the site where the sperm fertilizes the egg before the fertilized egg continues its journey towards the uterus for implantation. The ovary is where the egg is produced but not where fertilization occurs. The uterus is where the fertilized egg implants and develops into a fetus, not where fertilization takes place. The vagina is part of the birth canal and not the typical site for fertilization in the female reproductive system.
2. What is the main difference between a nuclear reactor and a nuclear bomb?
- A. Reactors use enriched uranium, while bombs use natural uranium.
- B. Reactors have controlled chain reactions, while bombs have uncontrolled chain reactions.
- C. Reactors generate electricity, while bombs cause explosions.
- D. Reactors use moderators, while bombs don't.
Correct answer: B
Rationale: The main difference between a nuclear reactor and a nuclear bomb is that reactors have controlled chain reactions, while bombs have uncontrolled chain reactions. Nuclear reactors are designed to sustain a controlled nuclear reaction to generate electricity. In contrast, nuclear bombs are designed to release a massive amount of energy in an uncontrolled chain reaction, resulting in an explosion. Choice A is incorrect because both reactors and bombs can use enriched uranium. Choice C is incorrect as nuclear reactors also generate electricity, not just bombs. Choice D is incorrect because both reactors and bombs may or may not use moderators, but the key distinction lies in the control of the chain reaction.
3. Which structure helps regulate body temperature by constricting or dilating in response to temperature changes?
- A. Sebaceous glands
- B. Hair follicles
- C. Sweat glands
- D. Langerhans cells
Correct answer: C
Rationale: Sweat glands play a crucial role in regulating body temperature by producing sweat that evaporates from the skin surface. This evaporation cools the body when it is hot and helps to maintain a stable internal temperature. Sebaceous glands produce oil to lubricate the skin, hair follicles are responsible for hair growth, and Langerhans cells are a type of immune cell in the skin. Therefore, the correct answer is 'Sweat glands' as they are specifically designed to respond to temperature changes by constricting or dilating to help regulate body temperature.
4. In nuclear fusion, where does the released energy originate from?
- A. The fission of heavy nuclei
- B. The binding energy released during the fusion of light nuclei
- C. Electronic transitions within atoms
- D. Matter-antimatter annihilation
Correct answer: B
Rationale: The correct answer is B: 'The binding energy released during the fusion of light nuclei.' Nuclear fusion involves the combination of light nuclei to form a heavier nucleus, releasing energy in the process. This energy arises from the binding energy that keeps the nucleus intact. As lighter nuclei fuse, they create a more stable nucleus, and the excess energy is emitted as radiation. This fundamental process is the primary source of energy in stars and holds promise as a potential future energy source on Earth. Choices A, C, and D are incorrect. Choice A, 'The fission of heavy nuclei,' is related to nuclear fission, not fusion. Choice C, 'Electronic transitions within atoms,' refers to energy release in atomic transitions, not nuclear fusion. Choice D, 'Matter-antimatter annihilation,' is a process where matter and antimatter collide, converting their mass into energy, but it is not the energy source for nuclear fusion.
5. Which property of a substance describes its ability to conduct heat or electricity?
- A. Reactivity
- B. Conductivity
- C. Density
- D. Viscosity
Correct answer: B
Rationale: Conductivity is the correct property that describes a substance's ability to conduct heat or electricity. Reactivity is related to how readily a substance undergoes chemical reactions, not its ability to conduct heat or electricity. Density refers to the mass per unit volume of a substance, which is different from its ability to conduct heat or electricity. Viscosity measures a substance's resistance to flow, not its ability to conduct heat or electricity.
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