ACT Science Practice Test 76

I appreciate you providing this material, but I notice a significant mismatch between the PASSAGE and QUESTIONS: **The passage is a creative narrative** about a teenager named Katie on a bus encountering a silent boy named Jaime. It contains no underlined portions, no standalone digit markers, and no obvious multiple-choice answer points. **The questions (Q1–Q11) are about scientific experiments** involving fossil fuels, energy measurements, and cell cultures—topics that do not appear anywhere in the passage. **To help you correctly, I need clarification:** 1. **Is the passage correct?** Should it be a scientific passage about fossil fuels and cell culture experiments instead of the bus narrative? 2. **Are the questions correct?** Should they relate to the bus narrative story instead? 3. **Are there underlined portions in the original passage?** The text as provided has no `` tags or standalone digit markers that indicate where questions apply. Please provide: - The **correct passage** with OCR'd question-number markers (standalone digits) positioned where underlined text appears, OR - The **correct questions** that match the bus narrative passage Once you clarify, I'll render the HTML exactly as specified in my instructions.

The main source of the world’s energy for the last century has been fossil fuels. To use fossil fuels, we must be able to locate and recover them at affordable costs, convert them to usable forms, and use them without wasting them or harming the environment.

Experiment 1

Scientists set out to determine the energy potential of various fossil fuels. They burned 1 ton of each of 5 different fuel varieties, and measured the energy produced. Table 1 shows the energy content of various fossil fuels.

Table 1

Fuel	Energy Content (Btu/Ton)
Coal	25,000,000
Crude oil	37,000,000
Gasoline	38,000,000
Natural gas	47,000,000
Peat	3,500,000

Experiment 2

Students completed an experiment to measure the heat energy obtained from natural gas, using water, a Fahrenheit thermometer, and a Bunsen burner (see Figure 1). They filled a beaker with enough water to

Figure 1

weigh 1 pound (approximately 450 mL). They recorded the temperature of the water, then lit the Bunsen burner and stirred the water continuously. They took several measurements of the water’s temperature, at 5-minute intervals. The results of the experiment are displayed in Table 2.

Table 2

Time (m)	Water Temperature (°F)
0	67°
5	92°
10	117°
15	142°

Each type of fossil fuel releases a different amount of energy. This energy is measured in a variety of units. Table 3 provides a conversion chart for energy units.

Table 3

1 Btu =	.252 kilocalorie .000293 kilowatt-hour
1 kilocalorie =	3.97 Btus .0012 kilowatt-hour
1 kilowatt-hour =	3,413 Btus 860 kilocalories
1 barrel of oil =	5,600,000 Btus 1,410,579 kilocalories 1,640.8 kilowatt-hours

The growth of tumor cells in a culture depends on the amount of nutrients in the culture. Cell production can be determined by counting the number of cells. The effects of various concentrations of glucose and calcium on the growth of three different cell types were tested. Each culture dish began the test with 0.5 million cells, to which was added a solution containing known concentrations of either glucose or calcium. The results after three days are shown in Figures 1 and 2.

Figure 1

Figure 2

Science practice 55