ACT Science Domain 3: Evaluation of Models, Inferences, and Experimental Results Welcome to your ACT Science Domain 3: Evaluation of Models, Inferences, and Experimental Results 1. ACT Science: Evaluation of Models Inferences and Experimental Results A scientist is investigating the effects of different soil types on plant growth. She uses three types of soil: sandy, loamy, and clay. She plants the same species of plant in each type of soil and measures their growth over a month. The plants in the loamy soil grow the tallest. Which of the following can be inferred from this experiment? Loamy soil has the best nutrients for this plant species. All plant species grow best in loamy soil. Sandy soil does not contain any nutrients. Soil type does not affect plant growth. None 2. ACT Science: Evaluation of Models Inferences and Experimental Results A laboratory conducts an experiment to test the effect of varying light intensities on the rate of photosynthesis in plants. The results indicate that photosynthesis increases with light intensity up to a certain point, after which it levels off. What can be concluded from these results? Light intensity affects the rate of photosynthesis, but only to a certain level. Light intensity is the only factor that influences the rate of photosynthesis. The rate of photosynthesis will continue to increase indefinitely with more light. Light intensity has no impact on photosynthesis. None 3. ACT Science: Evaluation of Models Inferences and Experimental Results An experiment measures the impact of water temperature on the rate of chemical reactions in a solution. The results show that the rate of reactions increases with water temperature, but then sharply decreases at a certain point. What inference can be made from this result? High water temperatures can denature the reactants, leading to a decline in reaction rates. Higher water temperatures always lead to faster chemical reactions. Chemical reactions slow down at higher temperatures due to a lack of reactants. Temperature does not impact chemical reaction rates. None 4. ACT Science: Evaluation of Models Inferences and Experimental Results A group of scientists is studying the migration patterns of birds. They set up tracking devices on several species and observe their migration routes. They notice that all the observed species follow similar paths during migration. Which of the following could be inferred from this observation? The observed migration paths are the most optimal routes for these birds. All bird species follow the same migration routes. The migration routes are random. The tracking devices influenced the birds' migration paths. None 5. ACT Science: Evaluation of Models Inferences and Experimental Results An experiment is conducted to test the effect of varying pH levels on plant growth. The results indicate that plant growth is optimal within a specific pH range but declines significantly outside that range. What can be inferred from these results? Plants have a preferred pH range for optimal growth. All plants require the same pH range for growth. The pH level has no impact on plant growth. Plant growth is optimal at any pH level. None 6. ACT Science: Evaluation of Models Inferences and Experimental Results A scientist wants to test if varying amounts of fertilizer affect plant growth. She applies different amounts of fertilizer to three groups of plants and measures their growth. The group with the highest amount of fertilizer shows reduced growth. What can be inferred from this experiment? Excess fertilizer can have a negative impact on plant growth. More fertilizer always leads to better plant growth. Fertilizer has no effect on plant growth. The growth reduction is due to other factors. None 7. ACT Science: Evaluation of Models Inferences and Experimental Results A team of researchers is investigating whether varying sound frequencies affect plant growth. They expose plants to different frequencies and measure growth over time. The plants exposed to higher frequencies show reduced growth. What inference can be drawn from these results? High sound frequencies may have a negative impact on plant growth. Plants are not affected by sound frequencies. All plant species respond negatively to high sound frequencies. Plant growth is not influenced by sound frequencies. None 8. ACT Science: Evaluation of Models Inferences and Experimental Results An experiment is conducted to test whether varying carbon dioxide (CO2) levels affect plant growth. Plants are placed in chambers with different CO2 concentrations, and their growth is monitored. The results show that plant growth increases with higher CO2 levels but plateaus after a certain point. What can be concluded from these results? CO2 has an impact on plant growth, but only to a certain level. Higher CO2 levels always lead to increased plant growth. CO2 levels do not affect plant growth. Plant growth will continue to increase indefinitely with more CO2. None 9. ACT Science: Evaluation of Models Inferences and Experimental Results A group of scientists is studying the impact of various water salinity levels on fish behavior. They place fish in tanks with different salinity levels and monitor their movement and feeding patterns. The fish in the highest salinity tank exhibit decreased activity and reduced feeding. What can be inferred from this experiment? High salinity can negatively affect fish behavior. Fish thrive in high-salinity environments. Salinity levels have no impact on fish behavior. Fish behavior is random regardless of salinity levels. None 10. ACT Science: Evaluation of Models Inferences and Experimental Results An experiment is conducted to test the effect of various light colors on plant growth. Plants are exposed to different light colors, and their growth is measured. Plants exposed to red light show the most significant growth, while those exposed to blue light grow the least. What inference can be made from this experiment? Red light may promote more significant plant growth than blue light. All plants grow better under red light. Light color does not affect plant growth. Plants grow at the same rate regardless of light color. None 1 out of 10 Time is Up! Time's up
