Digital ACT Practice Questions
Access 297 official-caliber practice questions. Filter by subject or difficulty to pinpoint your cognitive blind spots.
Which conic section is represented by the equation 4x^2 - 9y^2 + 16x + 54y - 101 = 0?...
A lottery scratch-off ticket costs $2. The probabilities of winning various cash prizes are: $50 with probability 0.01, $10 with probability 0.05, and $2 with p...
Which fraction in simplest form is equal to the repeating decimal 0.545454... (0.54 with a bar over 54)?...
Vector A = and vector B = . What is the magnitude of the vector A + B?...
What is the maximum value of the function f(x) = -x^2 + 6x - 2 on the closed interval [0, 5]?...
In triangle ABC, side b = 10, side c = 14, and the measure of angle A is 30°. What is the area of triangle ABC in square units?...
For two positive numbers 4 and 36, what is the positive difference between their arithmetic mean and their geometric mean?...
An electronics retailer marks down the price of a laptop by 20%. During a holiday weekend promotion, the store takes an additional 15% off the already discounte...
Researchers exposed aquatic Elodea sprigs to light of different wavelengths for 30 minutes and counted the number of oxygen bubbles produced: - Violet (400 nm):...
A cylinder fitted with a frictionless piston contains an ideal gas at a constant temperature of 298 K. The pressure and volume data are recorded: - Trial 1: P =...
A student titrates 25.0 mL of 0.10 M acetic acid (CH3COOH) with 0.10 M NaOH. The pH measurements are recorded: - 0.0 mL NaOH added: pH = 2.87 - 12.5 mL NaOH add...
An experiment fired identical 50-gram spheres horizontally from a 20-meter cliff at an initial velocity of 15 m/s through chambers containing different gases: -...
Light in air (refractive index n = 1.00) enters three different transparent blocks at an incident angle of 45°: - Material X: Refracted angle = 32.0° - Material...
A molecular biology lab ran restriction-digested DNA fragments on an agarose gel at 100 V for 60 minutes: - Fragment 1 (1,000 base pairs): Migration distance = ...
Geologists analyzed the ratio of parent isotope potassium-40 (K-40) to daughter argon-40 (Ar-40) in volcanic ash layers within a sedimentary basin. The half-lif...
Two paleontologists debate the primary cause of the Cretaceous-Paleogene (K-Pg) mass extinction: Paleontologist 1 asserts that an asteroid impact 66 million yea...
Consider the exothermic synthesis of ammonia in a closed container: N2(g) + 3 H2(g) 2 NH3(g) + 92 kJ. A chemical engineer measures ammonia yield at equilibrium ...
A biology student recorded the rate of cellular respiration in Baker's yeast suspended in varying sucrose concentrations at 25°C: - 0% sucrose: 0.2 mL CO2/min -...
Physics students measured the period T of a pendulum while varying string length L and bob mass M: Experiment 1 (M = 100 g fixed): - L = 0.25 m: T = 1.00 s - L ...
A geophysics team studied seismic P-waves (compressional) and S-waves (shear) traveling through Earth's interior: - P-waves travel through both solids and liqui...
Students tested the electrical conductivity of four aqueous solutions: - Solution 1: 0.1 M NaCl -> 10,800 uS/cm - Solution 2: 0.1 M C12H22O11 (sucrose) -> 12 uS...
A physics lab applied varying tensile forces to a steel spring and measured the resulting displacement x from equilibrium: - Force = 2.0 N: Displacement = 4.0 c...
Agronomists monitored soybean net photosynthesis rate (umol CO2/m^2/s) under different atmospheric CO2 concentrations at constant light intensity: - 200 ppm: 11...
In a calorimetry lab, 100.0 g metal cylinders heated to 100.0°C were placed into insulated cups containing 100.0 g of water at 20.0°C: - Lead (c = 0.129 J/g°C):...
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