Medium ACT Mixed Subject Practice Questions

A composite ACT score of 20 represents the approximate national average, but students often struggle with the test's rapid pacing. To move beyond this average, you must become proficient in navigating the four core sections: English, Math, Reading, and Science. These Medium ACT Mixed Subject Practice Questions are designed to bridge the gap between basic content knowledge and the high-speed application required on test day. By working through a variety of subjects simultaneously, you simulate the mental shifting required during the actual exam, which is a critical component of effective ACT Prep.

Concept Explanation

Medium ACT mixed subject practice involves solving problems that require multiple steps or the application of intermediate-level rules across different disciplines. In the English section, this often means moving beyond simple spelling to address sentence structure and punctuation. Math shifts from basic arithmetic to algebra and geometry where you must set up your own equations. Reading and Science require you to synthesize information from a passage or data set rather than just locating a single fact. Understanding how these sections interact helps you manage your "cognitive load," allowing you to switch from the grammar rules of the English test to the spatial reasoning of the Math test without losing momentum.

Solved Examples

1. English (Punctuation): Consider the sentence: "The scientist discovered a new species of beetle; however, it was already extinct in the wild."
   1. Identify the two independent clauses: "The scientist discovered a new species of beetle" and "it was already extinct in the wild."
   2. Recognize the conjunctive adverb "however" used to join them.
   3. Apply the rule: Use a semicolon before the conjunctive adverb and a comma after it.
   4. The sentence is correctly punctuated as written.
2. Math (Algebra): A rental car company charges $30 per day plus $0.20 per mile. If Janelle rents a car for 3 days and her total bill is $140, how many miles did she drive?
   1. Set up the equation: $3(30) + 0.20m = 140$.
   2. Simplify the daily rate: $90 + 0.20m = 140$.
   3. Subtract 90 from both sides: $0.20m = 50$.
   4. Divide by 0.20: $m = 250$. Janelle drove 250 miles.
3. Science (Data Interpretation): A graph shows that as the temperature of a gas increases from $273 \text{ K}$ to $373 \text{ K}$, the volume increases linearly from $1.0 \text{ L}$ to $1.37 \text{ L}$. What is the predicted volume at $473 \text{ K}$?
   1. Observe the rate of change: For every $100 \text{ K}$ increase, the volume increases by $0.37 \text{ L}$.
   2. Add the next increment: $1.37 \text{ L} + 0.37 \text{ L} = 1.74 \text{ L}$.
   3. Confirm the relationship is linear and consistent with Charles's Law.

Practice Questions

1. (English) Choose the best version of the underlined portion: The team of researchers is planning to present their findings at the international conference in Zurich.
   • A. NO CHANGE
   • B. are
   • C. were
   • D. has been
2. (Math) What is the slope of a line that passes through the points $(3, -2)$ and $(-1, 6)$?
3. (Science) In an experiment, Plant A is given 10mL of water daily, while Plant B is given 50mL. If both plants are kept in the same sunlight and soil, what is the independent variable?

4. (English) Which of the following transitions best fits the start of the sentence? "The hike was grueling and steep. ________, the view from the summit was worth every step."
   • A. Consequently
   • B. Furthermore
   • C. Nevertheless
   • D. Similarly
5. (Math) Solve for $x$: $$3(x - 4) = 2x + 5$$
6. (Reading) A passage describes a character as "meticulous to a fault." This most likely suggests that the character is:
   • A. Extremely careless
   • B. Overly concerned with small details
   • C. Very generous with money
   • D. Physically weak
7. (Science) If a biologist observes that a specific enzyme denatures at temperatures above $45^\circ \text{C}$, which of the following would be an unlikely result of an experiment conducted at $50^\circ \text{C}$?
   • A. Lowered reaction rates
   • B. Increased substrate binding
   • C. Structural change in the enzyme
   • D. Ceasing of biological activity
8. (Math) A circle has a circumference of $10\pi$. What is its area?
9. (English) Select the correct punctuation: "After finishing the marathon the runner collapsed into the arms of his coach."
   • A. NO CHANGE
   • B. After finishing the marathon, the runner
   • C. After finishing, the marathon the runner
   • D. After finishing the marathon; the runner
10. (Reading) In a passage about the history of jazz, the author mentions the "syncopated rhythms of New Orleans." In this context, "syncopated" most nearly means:
    • A. Monotonous
    • B. Off-beat or irregular
    • C. Very slow
    • D. Strictly classical

Answers & Explanations

1. A (NO CHANGE): This is a subject-verb agreement question. The subject is "team" (singular), not "researchers." Therefore, the singular verb "is" is correct.
2. -2: Use the slope formula $m = \frac{y_2 - y_1}{x_2 - x_1}$. Substituting the values: $\frac{6 - (-2)}{-1 - 3} = \frac{8}{-4} = -2$.
3. The amount of water: The independent variable is the factor changed by the researcher to observe its effects. Since the water amount varies between the groups, it is the independent variable.
4. C (Nevertheless): This is a transition question. The sentence requires a contrast word because the second part of the sentence provides a positive outcome despite the negative difficulty mentioned in the first part.
5. 17: Distribute the 3: $3x - 12 = 2x + 5$. Subtract $2x$ from both sides: $x - 12 = 5$. Add 12 to both sides: $x = 17$.
6. B (Overly concerned with small details): Meticulous means showing great attention to detail. Being meticulous "to a fault" implies that the trait is taken to an extreme or excessive degree.
7. B (Increased substrate binding): When an enzyme denatures, its shape changes, preventing it from binding to substrates. Therefore, increased binding is the only unlikely outcome.
8. $25\pi$: The formula for circumference is $C = 2\pi r$. If $10\pi = 2\pi r$, then $r = 5$. The area formula is $A = \pi r^2$, so $A = \pi (5^2) = 25\pi$.
9. B (After finishing the marathon, the runner): This sentence begins with an introductory prepositional phrase. A comma is required to separate the introductory phrase from the main independent clause.
10. B (Off-beat or irregular): In music theory, syncopation involves a variety of rhythms which are in some way unexpected, making the beat off-center or irregular.

1. Which word best completes the sentence: "Despite the rain, the outdoor concert _______ as scheduled."?

• Aproceeded
• Bpreceded
• Cprocedes
• Dpreceed

Frequently Asked Questions

How many questions are on the ACT?

The ACT consists of 215 multiple-choice questions in total across the four mandatory sections. These are divided into 75 for English, 60 for Math, 40 for Reading, and 40 for Science.

What is a good score on the ACT?

A "good" score depends on your target college, but the national average is typically around 20-21. Scores above 28 are generally considered very competitive for most state universities and many private colleges.

Can I use a calculator on the ACT?

You are permitted to use a calculator only on the Mathematics section of the ACT. It must be an approved model, and you should check the official ACT calculator policy to ensure yours is allowed.

How long is the ACT?

The full ACT without the optional writing section takes approximately 2 hours and 55 minutes of actual testing time. If you include the writing test and breaks, the total duration is about 3 hours and 35 minutes.

Are there penalties for guessing on the ACT?

There is no penalty for guessing on the ACT, as your score is based only on the number of correct answers. You should always fill in an answer for every question, even if you have to guess randomly.