ACT Science Practice Test 72

I appreciate your detailed instructions, but I need to clarify an important issue with this task. The passage you've provided appears to be a collection of unrelated scientific tables and data (F-scale tornado damage, pH measurements, precipitation data, etc.) rather than a coherent reading passage. Additionally, there is no clear text with underlined portions and standalone digit markers that I can parse according to your protocol. The instructions assume: 1. A continuous narrative or reading passage with embedded standalone digits marking question locations 2. Underlined text phrases that can be identified by their position before these digit markers 3. A match between the question numbers and the markers in the passage text What you've provided looks like raw table data and fragments without the structural markers needed for me to identify which specific text portions are underlined. **To proceed, I would need:** - The actual formatted passage text (not just tables) where standalone digits appear after underlined phrases - Clarity on which text fragments correspond to which questions Could you provide the passage in the format described in your instructions, with the digit markers showing where each question's underlined text ends?

Tornado intensity is commonly estimated by analyzing damage to structures and then correlating it with the wind speed required to produce such destruction. This method is essential to assigning tornadoes specific values on the Fujita Scale (F scale) of tornado intensity (see Figure 1).

Figure 1

A tornado is formed when the following occurs: (1) warm, moist air rises into cool, dry air; (2) when the barrier is breached, a bulge of warm, moist air expands and condenses to form a cloud; (3) as air moves upward, the resulting instability creates a spiral of air called a mesocyclone; (4) cold air moves downward and rain falls as the cloud becomes a supercell; (5) cool, moist air from rain cycles back into a cloud, forming a spinning wallcloud; and (6) horizontal spiraling wind “tubes” are pushed upward by warm, moist air, forming a tornado. (See Figure 2.)

Figure 2

The United States has the most tornadoes of any country, and most of these tornadoes form in an area of the central United States known as “Tornado Alley.” Figure 3 displays a geographical (state-by-state) breakdown of the occurrence of tornadoes in the United States in 2005.

Figure 3

Acid deposition delivers acids and acidifying compounds to the Earth’s surface. Once on the surface, they move through soil, vegetation, and surface waters and, in turn, set off a cascade of adverse ecological effects. Acid deposition occurs in three forms: wet deposition, which falls as rain, snow, sleet, and hail; dry deposition, which includes particles, gases, and vapor; and cloud or fog deposition, which occurs at high altitudes and in coastal areas. Acid deposition is comprised of sulfuric acid, nitric acid, and ammonium derived from sulfur dioxide (SO₂), nitrogen oxides (NO_x), and ammonia (NH₃). Sulfuric and nitric acid lower the pH of rain, snow, soil, lakes, and streams.

Study 1

A specially designed collection bucket was used to gather rain samples. The collector opened automatically during wet weather, allowing the precipitation to fall into the collection bucket, and then closed as soon as the precipitation stopped. The sample was then taken to a laboratory, where it was weighed and its acidity was measured. Finally, the concentrations of important inorganic chemicals found in the precipitation were analyzed. The results are shown in Table 2.

Table 2

Study 2

Another study was done to compare the average pH of precipitation across various months. The same procedure was used as in Study 1, and the results are shown in Table 3.

Table 3

Science practice 51