HESI A2
HESI A2 Math Practice Test 2023
1. How many liters are in 300 milliliters?
- A. 0.3 liters
- B. 3 liters
- C. 0.03 liters
- D. 3.3 liters
Correct answer: A
Rationale: 300 milliliters is equivalent to 0.3 liters. To convert milliliters to liters, you need to move the decimal three places to the left. Therefore, the correct answer is A. Choice B (3 liters) is incorrect as it represents the conversion of 3000 milliliters. Choice C (0.03 liters) is incorrect as it represents the conversion of 30 milliliters. Choice D (3.3 liters) is also incorrect as it is not the correct conversion of 300 milliliters.
2. What statement about global warming is made in the passage on the Amazon Rainforest?
- A. Global warming is caused by deforestation.
- B. Global warming is unrelated to deforestation.
- C. Global warming is exaggerated.
- D. Global warming is not a concern.
Correct answer: A
Rationale: The correct statement about global warming in the passage on the Amazon Rainforest is that it is caused by deforestation. The passage explains that cutting down trees in the rainforest increases the amount of carbon dioxide in the air, leading to global warming. This is supported by the fact that the burning of Brazilian rainforests alone produces 200 million metric tons of carbon dioxide a year. Choice B is incorrect as the passage clearly establishes a direct link between deforestation and global warming. Choice C is incorrect as the passage does not suggest that global warming is exaggerated, but rather highlights the harmful effects of deforestation. Choice D is incorrect as the passage emphasizes the serious concern of global warming due to deforestation.
3. How does the integumentary system interact with the nervous system?
- A. The integumentary system removes heat from the neurons in the nervous system.
- B. The nervous system circulates nutrients outward to the integumentary system.
- C. Touch input via the integumentary system sends messages to the nervous system.
- D. Messages from the nervous system affect the color and texture of the skin.
Correct answer: C
Rationale: Touch input via the integumentary system sends messages to the nervous system. The integumentary system, comprising the skin, hair, and nails, functions as a sensory organ and a protective barrier against external threats. Specialized receptors in the skin detect stimuli like pressure, temperature, and pain, transmitting signals to the nervous system for interpretation. This communication enables the perception of touch and is vital for sensory processes, showcasing the interconnectedness between the integumentary and nervous systems. Choices A, B, and D are incorrect because the integumentary system primarily interacts with the nervous system through sensory input and communication of stimuli, rather than heat removal, nutrient circulation, or affecting skin color and texture based on nervous system messages.
4. What are neutral particles called?
- A. Neutrons
- B. Protons
- C. Electrons
- D. Cations
Correct answer: A
Rationale: Neutral particles, which have no electric charge, are known as neutrons. Neutrons are found in the nucleus of an atom along with protons. Electrons carry a negative charge and orbit the nucleus. Cations are positively charged ions formed by losing electrons. Therefore, the correct answer is 'Neutrons' as they are the neutral particles in an atom, unlike protons, electrons, or cations.
5. Select the sentence in which 'legal' is used as an adjective.
- A. He is a legal resident of the United States
- B. This is a legal action
- C. That action was legal
- D. He acted in a legal way
Correct answer: A
Rationale: The correct answer is A: 'He is a legal resident of the United States.' In this sentence, 'legal' is used to describe the type of resident he is, making it an adjective. The other choices use 'legal' as part of a noun phrase or an adverbial phrase, not as an adjective. Choice B uses 'legal' to describe the type of action, making it a noun adjunct. Choice C uses 'legal' to describe the legality of the action, making it part of an adjectival phrase. Choice D uses 'legal' to describe the manner in which he acted, making it an adverb.
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