what is the main idea of the passage about toxins and your health
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HESI A2

Reading Comprehension Practice Test HESI A2

1. What is the main idea of the passage about Toxins and Your Health?

Correct answer: A

Rationale: The passage emphasizes the long-term effects of environmental toxins such as lead, pesticides, and mercury on brain health, particularly as individuals age. Dr. Brian Schwartz's quote highlights the link between environmental exposure and cognitive decline, framing the entire discussion around the potential health ramifications of such exposure over time. This clearly aligns with choice A, making it the main idea of the passage.

2. What can be inferred from the passage about Daylight Savings Time?

Correct answer: A

Rationale: The correct answer is A: "It is primarily used to save energy during certain months." The passage clearly states that Daylight Savings Time was first put into practice by the German government in 1916 to save energy during the First World War. The US followed suit in 1918. This measure was unpopular initially, but the energy crisis in the 1970s led to making it a law. Choices B, C, and D are incorrect. Choice B is incorrect as the passage mentions that the British government initially refused the idea, and it was unpopular when first implemented. Choice C is incorrect as it was not the US but the British government that opposed the idea initially. Choice D is incorrect as Daylight Savings Time was not implemented to prevent jetlag, but rather to save energy and make better use of daylight hours.

3. Which sound waves have a higher pitch?

Correct answer: A

Rationale: Sound waves that are closer together have a higher pitch. This is explained by the Doppler Effect, where as a source of sound moves closer to an observer, the waves are compressed, resulting in a higher frequency and a higher pitch. Conversely, when the source moves away, the waves are stretched, leading to a lower frequency and a lower pitch. Therefore, choice A is correct. Choices B, C, and D are incorrect as they do not accurately describe the relationship between sound wave frequency and pitch.

4. Why was the roadway of the Golden Gate Bridge so dangerous to build?

Correct answer: B

Rationale: The correct answer is B. The passage describes how the road had to be balanced during construction to avoid collapse into the bay. Choice A is incorrect as the Golden Gate Bridge crosses a strait, not a river. Choice C is incorrect as there is no mention of unstable materials. Choice D is incorrect as bad weather is not highlighted as a specific reason for the danger in building the roadway.

5. What conclusion can a reader draw about the connection between sleep and young children?

Correct answer: B

Rationale: The study outlined in the passage indicates that children who lack adequate sleep are at a higher risk for behavioral and physical issues, such as obesity and attention disorders. This conclusion is derived from the evidence provided in the passage, suggesting a direct link between sleep deprivation and negative outcomes, thus supporting option B..

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