which energy conversion occurs in a solar cell

ATI TEAS 7

ati teas 7 science

1. What energy conversion occurs in a solar cell?

A. Electrical energy to light energy
B. Chemical energy to electrical energy
C. Solar energy to thermal energy
D. Solar energy to electrical energy

Correct answer: D

Rationale: Solar cells, also known as photovoltaic cells, convert solar energy from sunlight directly into electrical energy through a process called the photovoltaic effect. This process involves the absorption of photons from sunlight, which then generate an electric current. Choice A is incorrect because solar cells do not convert electrical energy into light energy. Choice B is incorrect as solar cells do not involve chemical energy conversion. Choice C is incorrect because solar cells do not primarily convert solar energy into thermal energy. Therefore, the correct answer is D) Solar energy to electrical energy.

2. Why is warming up before exercise important?

A. To prevent dehydration
B. To prevent muscle soreness
C. To prevent increased heart rate
D. To prevent low blood sugar

Correct answer: B

Rationale: Warming up before exercise is crucial to prevent muscle soreness. It helps by increasing blood flow to the muscles, improving flexibility, and preparing the body for physical activity. Dehydration, increased heart rate, and low blood sugar are not directly prevented by warming up before exercise. Dehydration is prevented by proper hydration before and during exercise; increased heart rate is a normal physiological response to exercise; and low blood sugar is managed through proper nutrition and timing of meals before physical activity.

3. Four friends are sharing a pizza. One friend eats half of the pizza. The other three friends equally divide the rest among themselves. What portion of the pizza does each of the other three friends receive?

A. 1/5
B. 1/3
C. 1/4
D. 1/6

Correct answer: A

Rationale: After one friend eats half of the pizza, the remaining half is divided equally among the three other friends. Each of the three friends receives 1/3 of the remaining half, not 1/6. Therefore, the correct answer is 1/3 of 1/2, which is 1/6 of the total pizza. The incorrect choices are: B. 1/3 - This is the correct portion of the remaining pizza each friend receives, not 1/3. C. 1/4 - This is not the accurate portion each friend receives after the first friend eats half of the pizza. D. 1/6 - This is the portion of the total pizza each friend receives, not the portion each friend receives after the initial half is consumed.

4. Which of the following examples uses correct punctuation?

A. The moderator asked the candidates, “Is each of you prepared to discuss your position on global warming?”.
B. The moderator asked the candidates, “Is each of you prepared to discuss your position on global warming?”
C. . The moderator asked the candidates, ‘Is each of you prepared to discuss your position on global warming?’
D. The moderator asked the candidates, ‘Is each of you prepared to discuss your position on global warming?’

Correct answer: B

Rationale: Option B is the correct answer because it correctly places the period inside the closing quotation mark, following the closing punctuation of the sentence. This is the standard punctuation rule for quotations in American English. Choice A is incorrect as it has an extra period outside the closing quotation mark. Choice C is incorrect as the period should come after the closing quotation mark. Choice D is incorrect as it lacks the initial space before the quotation, not adhering to proper punctuation rules.

5. Which of the following sources is most likely to provide relevant data on the effects of mobile use on consumers' hearing?

A. A consumer report about surcharges applied to customers' bills by mobile phone companies
B. A professional journal article about the incidence of generic hearing loss
C. A university research paper about decibel limits of headphones and speakers
D. A statistical report of mobile phone usage by a mobile phone company

Correct answer: C

Rationale: The most relevant source for data on the effects of mobile use on consumers' hearing would be a university research paper about decibel limits of headphones and speakers. This source would provide specific information on how mobile use could potentially impact hearing due to the sound levels produced by headphones and speakers. Choice A discusses surcharges on bills, which is unrelated to hearing effects. Choice B focuses on the incidence of hearing loss in general, not specifically related to mobile use. Choice D, a statistical report on mobile phone usage, may not directly address the impact on consumers' hearing.