Digital ACT Practice Questions

What is the measure of each exterior angle of a regular octagon (8-sided polygon)?...

A cylinder and a cone have the exact same base radius r and height h. If the volume of the cylinder is 72pi cubic inches, what is the volume of the cone in cubi...

A biology team measured the reaction velocity (in micromoles/min) of human salivary amylase across various pH levels at 37°C: Table 1: - pH 4.0: 12 umol/min - p...

An environmental engineer measured dissolved oxygen (DO) concentration in a freshwater river at various water temperatures: - 5°C: 12.8 mg/L - 10°C: 11.3 mg/L -...

An investigation examined the activity of beef liver catalase by measuring oxygen gas produced over 60 seconds at different H2O2 concentrations: - 0.5% H2O2: 14...

An engineering student measured current across a resistor as voltage was increased: - 2.0 V: 0.10 A - 4.0 V: 0.20 A - 6.0 V: 0.30 A - 8.0 V: 0.40 A - 10.0 V: 0....

Hydrologists poured 500 mL of water through 50 cm columns filled with different soil textures and measured percolation time: - Sand: 45 seconds - Sandy Loam: 18...

A weather balloon measured atmospheric pressure during ascent: - 0 m (sea level): 101.3 kPa - 2,000 m: 79.5 kPa - 4,000 m: 61.6 kPa - 6,000 m: 47.2 kPa - 8,000 ...

Bean plants were placed under four environmental conditions for 6 hours with a potometer: - Normal room: Water loss = 12.4 mL - High humidity: Water loss = 4.2 ...

A solar panel was tested under constant artificial sunlight at different angles of incidence: - 0° (perpendicular): Power = 100 W - 30°: Power = 86.6 W - 45°: P...

An astronomical catalog classified four stars on the Hertzsprung-Russell (H-R) diagram: - Star W (Spectral class O, Temp = 35,000 K): Luminosity = 100,000 L_sun...

A nuclear chemistry lab measured radiation activity from Ba-137m over time: - 0 min: 8,000 cpm - 2.6 min: 4,000 cpm - 5.2 min: 2,000 cpm - 7.8 min: 1,000 cpm Wh...

Meteorological data across a fast-moving cold front: - Ahead of front (Warm sector): Temp = 24°C, Pressure = 100.8 kPa, Winds from SW - Behind front (Cold secto...

As it is used in the passage, the word 'colossal' most nearly means: Passage Excerpt (Social Science): While 19th-century historians romanticized the overland c...

Which of the following hazards of maritime trade is explicitly mentioned in the passage? Passage Excerpt (Social Science): While 19th-century historians romanti...

The phrase 'form follows function' in the passage implies that an object's visual appearance should: Passage Excerpt (Humanities): Founded by Walter Gropius in ...

According to the passage, which materials became hallmarks of Bauhaus design? Passage Excerpt (Humanities): Founded by Walter Gropius in Weimar in 1919, the Bau...

As it is used in the passage, the word 'spewing' most nearly conveys: Passage Excerpt (Natural Science): Prior to the 1977 discovery of hydrothermal vents along...

Maya's attitude toward the heirloom apple varieties (such as the Roxbury Russet) is best described as: Passage Excerpt (Literary Narrative): Walking down the mo...

According to prospect theory, how does the psychological impact of losing $100 compare to winning $100? Passage Excerpt (Social Science): Classical economic the...

As it is used in the passage, the word 'skew' most nearly means: Passage Excerpt (Social Science): Classical economic theory presumed that human beings are rati...

Which of the following optical tools did Brunelleschi use during his famous 1415 demonstration? Passage Excerpt (Humanities): In 1415, Florentine architect Fili...

As it is used in the passage, the word 'shear' most nearly means: Passage Excerpt (Literary Narrative): On the pitching deck of the salvage ship, Captain Donald...

Why were standard 18th-century pendulum clocks ineffective aboard ocean-going sailing vessels? Passage Excerpt (Social Science): In 1714, the British Parliament...