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ACT (Enhanced) practice questions

216 free questions with answers and explanations.

Practice test
  1. 201.A meteorologist is tracking a weather balloon. The balloon's altitude (h) in meters above ground after t minutes is given by the function h(t) = -t^2 + 10t + 50. What is the maximum altitude the balloon reaches?Mathematics
  2. 202.A paleontologist is dating a fossil using carbon-14. The amount of carbon-14 remaining in a sample can be modeled by the equation A(t) = A_0 * (1/2)^(t/5730), where A_0 is the initial amount and 5730 years is the half-life. If a fossil sample contains 12.5% of its original carbon-14, approximately how old is the fossil?Mathematics
  3. 203.A student is drafting an essay about the impact of artificial intelligence on daily life. They are discussing how AI systems learn from data and want to use a precise term to describe the process where an AI modifies its behavior based on new information. Which of the following words best conveys this meaning?English
  4. 204.A student is reviewing a peer's argumentative essay and notices a sentence that contains a logical fallacy. The sentence reads: 'Everyone knows that climate change is a hoax, so there's no need to worry about it.' Which logical fallacy is present in this statement?English
  5. 205.A student is writing a report for a science class and wants to maintain a formal and objective tone. They have written the following sentence: 'Many people reckon that the experiment's results were pretty cool.' Which revision best maintains the desired tone?English
  6. 206.Read the following excerpt from a historical analysis of the American Civil War: "The Anaconda Plan, conceived by General Winfield Scott, aimed to suppress the Confederacy by blockading Southern ports and controlling the Mississippi River. While initially derided as too slow and cumbersome, its strategic objectives, particularly the economic strangulation of the South, proved remarkably effective in the long term, albeit at a heavy cost in both time and resources. The plan demonstrated a foresight that many contemporary critics lacked, understanding that a prolonged war of attrition, rather than a swift decisive battle, would ultimately determine the conflict's outcome." Which of the following statements best describes the author's overall assessment of the Anaconda Plan?Reading
  7. 207.A biologist is studying a newly discovered species of deep-sea fish. The fish exhibits bioluminescence, producing light through a chemical reaction. The biologist observes that the light is primarily emitted from specialized organs located along the fish's underside. Based on this observation, what is the most likely primary function of this bioluminescence?Reading
  8. 208.A biologist is observing a population of fruit flies. The population, P(t), after t days can be modeled by the equation P(t) = 500 / (1 + 4e^(-0.2t)). What is the initial population of fruit flies?Mathematics
  9. 209.A student is writing an argumentative essay about the necessity of arts education in schools. They want to introduce a point that adds further evidence or builds upon a previous argument. Which of the following transitional phrases would be most appropriate?English
  10. 210.A literary critic is analyzing a novel that ends with the protagonist, after years of searching, discovering that the 'ancient treasure' they sought was merely a collection of mundane family letters. The critic notes that this ending is 'not just ironic, but profoundly tragic.' What literary device is the critic most likely referring to when describing the ending as 'profoundly tragic'?Reading
  11. 211.A civil engineer is calculating the maximum stress a support beam can withstand. The stress (S) is directly proportional to the applied load (L) and inversely proportional to the square of its thickness (T). If a beam with a thickness of 0.2 meters can withstand 100 Pascals with a load of 500 Newtons, what stress can a beam with a thickness of 0.4 meters withstand with the same load?Mathematics
  12. 212.A student is writing an essay about the history of space exploration and wants to vary their sentence structure to make the writing more engaging. They have a series of short, choppy sentences: 'The Sputnik satellite launched in 1957. It was a major milestone. It sparked the space race.' Which of the following options best combines these sentences to create more sentence variety?English
  13. 213.A student is writing a narrative essay about a hiking trip. They want to include a sentence that uses vivid imagery to describe the sound of a nearby waterfall. Which of the following sentences best uses sensory details to achieve this?English
  14. 214.A student is writing a research paper on the effects of climate change and wants to ensure that all verb tenses are consistent within a paragraph describing a historical trend. The original paragraph reads: 'In the past decade, ocean temperatures rose significantly. Scientists predict that this trend will continue, and many marine species already suffered from habitat loss.' Which revision corrects the verb tense inconsistency?English
  15. 215.A financial analyst is modeling the value of a stock. The value V(t) in dollars after t months is given by V(t) = 50e^(0.04t). What is the instantaneous rate of change of the stock value after 6 months?Mathematics
  16. 216.A student is writing a persuasive essay arguing for stricter regulations on plastic waste. They want to include a statement that appeals to the reader's sense of logic and reason by presenting a widely accepted general truth or principle. Which of the following rhetorical appeals are they primarily using?English