ASVAB Paragraph Comprehension Test 2 — Questions and Answers
Question 1: Read the following passage and answer the question: 'The global average temperature has risen approximately 1.2°C above pre-industrial levels. Scientists warn that without significant reductions in greenhouse gas emissions, the planet could warm by 3-4°C by the end of the century, triggering more extreme weather events, rising sea levels, and widespread ecological disruption.' According to the passage, what could happen if greenhouse gas emissions are not significantly reduced?
- Temperatures will remain at current levels
- The planet could warm by 3-4°C by end of century (Correct answer)
- Sea levels will stabilize
- Greenhouse gases will naturally decrease
Correct answer: The planet could warm by 3-4°C by end of century
The passage directly states that without significant reductions in greenhouse gas emissions, the planet could warm by 3-4°C by the end of the century.
Paragraph comprehension questions test your ability to identify information that is explicitly stated in a passage versus information that is implied or not mentioned at all. The key skill is reading carefully and basing your answer strictly on what the passage says. In this passage, the answer to the question is directly stated: 'the planet could warm by 3-4°C by the end of the century.' The phrase 'without significant reductions in greenhouse gas emissions' is the condition specified in both the question and the passage. Option A is incorrect because the passage implies temperatures will continue rising, not remain stable. Option C is directly contradicted by the passage, which mentions 'rising sea levels.' Option D is not mentioned anywhere in the passage. A critical strategy in paragraph comprehension is to avoid choosing answers based on your prior knowledge about the topic. Even if you know that greenhouse gases do naturally cycle, that information isn't in the passage. ASVAB paragraph comprehension tests what the passage says, not what you already know.
Question 2: Read the following passage and answer the question: 'Photosynthesis is the process by which plants, algae, and some bacteria convert light energy, usually from the sun, into chemical energy stored in glucose. This process requires carbon dioxide, water, and sunlight. Oxygen is released as a byproduct. Without photosynthesis, most life on Earth could not exist.' What does the passage identify as a byproduct of photosynthesis?
- Carbon dioxide
- Glucose
- Water
- Oxygen (Correct answer)
Correct answer: Oxygen
The passage explicitly states that 'Oxygen is released as a byproduct' of photosynthesis.
Paragraph comprehension questions often test whether you can distinguish between the main subject, inputs, and outputs described in a passage. This question uses the specific term 'byproduct,' which the passage also uses — making this a direct recall question. The passage clearly states: 'Oxygen is released as a byproduct.' The other answer choices appear in the passage but in different roles: carbon dioxide is listed as an input ('requires carbon dioxide'), glucose is the main product (chemical energy stored in glucose), and water is another input ('requires... water'). Reading comprehension pitfalls to avoid: Don't confuse inputs with outputs. The question asks about a byproduct specifically — a secondary product produced alongside the main product. Even though glucose, CO2, and water all appear in the passage, only oxygen is identified as the byproduct. On the ASVAB, the Paragraph Comprehension subtest has 11 questions to be completed in 22 minutes (CAT version) or 15 questions in 13 minutes (paper version). Questions will always be answerable from the passage alone — you don't need outside knowledge, and you shouldn't let outside knowledge contradict what the passage says.
Question 3: Read the following passage and answer the question: 'Coral reefs, often called the rainforests of the sea, support approximately 25% of all marine species despite covering less than 1% of the ocean floor. These ecosystems are under threat from warming ocean temperatures, ocean acidification, and pollution. When water temperatures rise even slightly above normal, corals expel the algae living in their tissues, causing coral bleaching.' What is the best title for this passage?
- Ocean Pollution: Causes and Solutions
- Coral Reefs: Vital but Threatened Ecosystems (Correct answer)
- How Marine Algae Supports Ocean Life
- Rainforests Compared to Ocean Ecosystems
Correct answer: Coral Reefs: Vital but Threatened Ecosystems
The passage focuses on coral reefs — describing their importance (supporting 25% of marine species) and the threats they face (warming, acidification, pollution, bleaching). The best title captures both the value and the vulnerability.
Finding the best title is a 'main idea' question — you must identify what the passage is primarily about and select the title that best captures the overall topic and focus. The passage covers two main points about coral reefs: (1) their ecological importance (supporting 25% of marine species despite covering less than 1% of ocean floor), and (2) the threats they face (warming temperatures, acidification, pollution, bleaching). A good title should reflect both aspects. Option A (Ocean Pollution) is too narrow and focuses only on one of several threats mentioned. Option C (Marine Algae) misrepresents the passage — algae is mentioned only in the context of coral bleaching, not as a main topic. Option D incorrectly suggests a direct comparison between rainforests and ocean ecosystems; the 'rainforests of the sea' phrase is used as a metaphor, not as a comparison topic. Option B — 'Coral Reefs: Vital but Threatened Ecosystems' — captures both the ecological importance ('vital') and the threats ('threatened'), accurately reflecting the passage's complete focus. Always choose the title that covers the full scope of the passage, not just one detail.
Question 4: Read the following passage and answer the question: 'Sonar technology, which stands for Sound Navigation and Ranging, uses sound waves to detect and locate objects underwater. Active sonar emits sound pulses and listens for echoes; passive sonar only listens without emitting signals. Submarines typically use passive sonar to avoid detection while still monitoring their surroundings.' Why do submarines prefer passive sonar over active sonar?
- Passive sonar works better in shallow water
- Passive sonar is more accurate than active sonar
- Passive sonar does not emit signals, helping submarines avoid detection (Correct answer)
- Passive sonar is less expensive to operate
Correct answer: Passive sonar does not emit signals, helping submarines avoid detection
According to the passage, submarines use passive sonar 'to avoid detection' because passive sonar only listens and does not emit sound signals that could betray the submarine's position.
This question tests your ability to identify cause-and-effect relationships within a passage. The passage states that submarines 'typically use passive sonar to avoid detection while still monitoring their surroundings.' The reason is directly given: avoiding detection. The logic chain from the passage: Active sonar emits signals → these signals could be detected by others → passive sonar only listens, emitting nothing → nothing to detect → submarine remains hidden. The passage makes this explicit in a single sentence. Option A (shallow water performance) is not mentioned in the passage. Option B (accuracy) is not mentioned — the passage doesn't compare accuracy. Option D (cost) is not mentioned. Only Option C is directly supported by the passage text. In ASVAB paragraph comprehension, when a passage directly states the reason for something, the correct answer usually quotes or closely paraphrases that stated reason. Be cautious of answers that sound plausible from general knowledge but aren't mentioned in the passage — the correct answer must be supported by the passage.
Question 5: Read the following passage and answer the question: 'The human body's immune system has two main branches: the innate immune system, which provides immediate but non-specific defense against pathogens, and the adaptive immune system, which develops a targeted response over days and provides long-lasting immunity. Vaccines work by training the adaptive immune system to recognize specific pathogens without causing the disease itself.' According to the passage, how do vaccines work?
- They immediately destroy pathogens using the innate immune system
- They train the adaptive immune system to recognize pathogens without causing disease (Correct answer)
- They create permanent barriers against all types of pathogens
- They suppress the immune system to prevent overreaction
Correct answer: They train the adaptive immune system to recognize pathogens without causing disease
The passage explicitly states that vaccines work 'by training the adaptive immune system to recognize specific pathogens without causing the disease itself.'
This comprehension question tests literal understanding of an informational passage. The final sentence directly answers the question: 'Vaccines work by training the adaptive immune system to recognize specific pathogens without causing the disease itself.' Distractors in this question: Option A contradicts the passage, which states the innate system is 'immediate' but 'non-specific' — vaccines specifically work through the adaptive, not innate, system. Option C (permanent barriers against all pathogens) is an overstatement — the passage says vaccines help the adaptive system recognize 'specific pathogens,' not all pathogens. Option D (suppressing the immune system) is the opposite of what vaccines do and is not mentioned in the passage. A reading strategy for these questions: Read the passage carefully once, then read each question, then re-read the relevant part of the passage. For questions with a direct answer, the answer is usually a close paraphrase of text from the passage. If you can point to the specific sentence that supports your answer, you're likely correct.
Question 6: Read the following passage and answer the question: 'Mount Everest, at 8,849 meters (29,032 feet), is Earth's highest mountain above sea level. However, if measured from Earth's center, Mount Chimborazo in Ecuador is actually farther from Earth's center because it sits near the equatorial bulge. Additionally, Mauna Kea in Hawaii, when measured from its oceanic base, is taller than Everest from base to summit.' What can be concluded from this passage?
- Mount Everest is the most difficult mountain to climb
- There are multiple ways to define and measure the 'tallest' mountain (Correct answer)
- Mauna Kea is officially recognized as Earth's tallest mountain
- Ecuador has the world's highest elevation above sea level
Correct answer: There are multiple ways to define and measure the 'tallest' mountain
The passage presents three different mountains as 'tallest' depending on how height is measured, leading to the conclusion that 'tallest' depends on the measurement method used.
This question asks for a conclusion — an inference supported by the overall content of the passage. Unlike literal questions, conclusion questions require you to synthesize the information presented and identify the logical implication. The passage presents three different mountains as 'tallest' by different criteria: Everest (highest above sea level), Chimborazo (farthest from Earth's center), and Mauna Kea (tallest base-to-summit). The common thread is that each definition uses a different measurement methodology. The logical conclusion is that how you define 'tallest' determines which mountain qualifies. Option A (difficulty) is not mentioned in the passage. Option C is incorrect — Mauna Kea is described using the base-to-summit measurement, not officially recognized; the passage implies each measurement has validity, not that one is official. Option D is incorrect — the passage says Chimborazo is farthest from Earth's center due to the equatorial bulge, not highest above sea level. For conclusion questions, the answer should be directly supported by evidence in the passage but not necessarily stated word-for-word. Eliminate answers that go beyond what the passage states (too broad) or contradict the passage.
ASVAB Paragraph Comprehension Test 2
Read the following passage and answer the question:
'The global average temperature has risen approximately 1.2°C above pre-industrial levels.
Scientists warn that without significant reductions in greenhouse gas emissions, the planet could warm by 3-4°C by the end of the century, triggering more extreme weather events, rising sea levels, and widespread ecological disruption.'
According to the passage, what could happen if greenhouse gas emissions are not significantly reduced?
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Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- officialasvab.com — Score validity, test delivery, eligibility, score release, retake policy, passing score, exam format, time limit · verified Oct 2026
- prod-media.asvabprogram.com — Eligibility · verified Oct 2026