ACT Science Practice

Front

What is the benchmark for Science?

Back

23

Front

What does it mean to be “college ready” according to ACT?

Back

capable of earning C or better in first-year college courses

Front

Which graph best illustrates the relationship between the heat released by the foods listed in Table 1 and the change in water temperature? Options: A, B, C, D

Back

B

Front

If a 1.5 × 10–6 F capacitor had been used in Experiment 2, how long would it take for the voltage across the capacitor to reach 6 V?

Back

10.5 sec

Front

The main purpose of Experiment 3 was to determine how varying the capacitor’s capacitance affected the time required for the voltage across the capacitor to reach a set value.

Back

capacitor’s capacitance affected the time required for the voltage across the capacitor to reach a set value.

Front

Consider a circuit like that shown in Figure 1. Based on Experiments 2 and 3, the voltage across the capacitor will reach a given value in the shortest amount of time if the circuit contains which of the following capacitances and resistances, respectively: 0.1 × 10–6 F, 0.3 × 107 Ω, 0.1 × 10–6 F, 1.0 × 107 Ω, 1.2 × 10–6 F, 0.3 × 107 Ω, 1.2 × 10–6 F, 1.0 × 107 Ω?

Back

0.1 × 10–6 F, 0.3 × 107 Ω

Front

In a circuit with a battery, capacitor, and constant resistance, does increasing capacitance increase the time to reach a given voltage?

Back

Yes; in Experiment 2, as capacitance increased, the time required to reach a given voltage increased.

Front

A student wants to test the effects of type of exercise on heart rate. What is the independent variable?

Back

type of exercise

Front

A student wants to test the effects of type of exercise on heart rate. What would be a proper hypothesis?

Back

If type of exercise affects the heart rate of a person, then jumping jacks will increase the heart rate the most.

Front

A student wants to test the effects of type of exercise on heart rate. What would be a good experimental group? (Options: jumping jacks, push-ups, sit-ups, jogging in place, lunges, standing heart rate)

Back

jumping jacks, push-ups, sit-ups, jogging in place, lunges