Digital ACT Practice Questions

A volcanologist hypothesizes that explosive volcanic eruptions are fueled by expanding volatile gases unable to easily escape high-viscosity magmas. Based on Ta...

Based on Table 1, as substrate concentration increases from 5 mM to 160 mM, the reaction velocity: Experiment Context (Enzyme Kinetics of Catalase): Researchers...

In this experiment, which of the following variables was held constant? Experiment Context (Enzyme Kinetics of Catalase): Researchers measured the initial react...

At substrate concentrations above 80 mM, the rate of increase in velocity slows primarily because: Experiment Context (Enzyme Kinetics of Catalase): Researchers...

Based on Table 2, Species Y is best classified as a: Experiment Context (Photoperiodic Induction of Flowering): Botanists exposed three varieties of plants (Spe...

Which species demonstrated flowering behavior completely independent of dark period length? Experiment Context (Photoperiodic Induction of Flowering): Botanists...

If a researcher briefly interrupts the 16-hour dark period of Species Y with a 5-minute flash of red light, Species Y will most likely: Experiment Context (Phot...

Based on Table 3, doubling the release height h from 0.20 m to 0.40 m causes the launch speed to: Experiment Context (Incline Ramp Velocity and Range): A steel ...

If a sphere were released from a height h = 1.60 m under identical conditions, the predicted horizontal range would be closest to: Experiment Context (Incline R...

The time required for the sphere to fall from the table edge to the floor depends exclusively on: Experiment Context (Incline Ramp Velocity and Range): A steel ...

Based on Table 4, the equivalence point of this titration occurred at: Experiment Context (Potentiometric Titration of Weak Acid): A 25.0 mL sample of 0.10 M ac...

At 12.5 mL of added NaOH (the half-equivalence point), the pH equals 4.76. This value represents the: Experiment Context (Potentiometric Titration of Weak Acid)...

Why is the pH at the equivalence point (25.0 mL NaOH) basic (pH = 8.72) rather than neutral (pH = 7.00)? Experiment Context (Potentiometric Titration of Weak Ac...

Based on Table 5, which soil sample has the highest hydraulic conductivity? Experiment Context (Hydraulic Conductivity of Soil Columns): Civil engineers packed ...

Which factor most directly explains why Soil Sample C permitted the lowest percolation volume? Experiment Context (Hydraulic Conductivity of Soil Columns): Civi...

If an engineer needs to line the bottom of a municipal landfill to prevent toxic leachate from seeping into aquifers, which soil type is best suited? Experiment...

Based on Table 6, which material causes the greatest degree of bending (refraction) of the laser beam? Experiment Context (Refraction of Monochromatic Light): S...

According to Snell's Law (n1 * sin(theta_1) = n2 * sin(theta_2)), the index of refraction n2 is greatest in: Experiment Context (Refraction of Monochromatic Lig...

As light passes from air into any of these three dense materials, what happens to its frequency and wavelength? Experiment Context (Refraction of Monochromatic ...

Based on Table 7, adding resistors in parallel causes the total circuit current to: Experiment Context (Series and Parallel Resistor Circuits): An electronics l...

What is the total power dissipated by Circuit 5 (three 6.0 ohm resistors in parallel)? Experiment Context (Series and Parallel Resistor Circuits): An electronic...

If one resistor burns out and becomes an open circuit in Circuit 2 (series) versus Circuit 4 (parallel): Experiment Context (Series and Parallel Resistor Circui...

Based on Table 8, during which time interval was the bacterial population dividing at its maximum exponential rate? Experiment Context (Bacterial Population Gro...

The plateau in population density between Hour 6 and Hour 8 is most likely caused by: Experiment Context (Bacterial Population Growth Phases): Microbiologists i...