Digital ACT Practice Questions

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...