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Question 1
Table 1 shows the solubility of four salts (in grams per 100 mL of water) at three temperatures: Salt | 20°C | 40°C | 60°C NaCl | 35.7 | 36.6 | 37.3 KNO3 | 31.6 | 63.9 | 110.0 Na2SO4 | 19.5 | 48.8 | 45.3 KCl | 34.0 | 40.0 | 45.5 Which salt shows the greatest increase in solubility between 20°C and 60°C?
Correct Answer:
KNO3
Question 2
Table 1 (from Question 1) shows the solubility of four salts at three temperatures. A student needs to dissolve 50 g of Na2SO4 in 100 mL of water. Based on Table 1, at which of the following temperatures is this most likely to succeed? Salt | 20°C | 40°C | 60°C Na2SO4 | 19.5 | 48.8 | 45.3
Correct Answer:
40°C, because solubility exceeds 50 g/100 mL at that temperature
Question 3
Figure 1 shows a scatterplot of plant height (cm) versus amount of fertilizer applied (g/m²) for 20 tomato plants. The data show a positive linear trend from (0, 12) to (100, 62), with the equation of the best-fit line approximately: Height = 0.5 × (Fertilizer) + 12. Based on Figure 1, what is the predicted height of a tomato plant that receives 80 g/m² of fertilizer?
Correct Answer:
52 cm
Question 4
A bar graph shows the average wingspan (cm) of five bird species: Species A: 45 cm Species B: 82 cm Species C: 61 cm Species D: 38 cm Species E: 95 cm A researcher claims that a wingspan above 60 cm is associated with longer migration distances. Based solely on the bar graph, how many species have wingspans consistent with this claim?
Correct Answer:
3
Question 5
Figure 2 shows two overlapping line graphs of atmospheric CO2 concentration (ppm) and average global surface temperature anomaly (°C) from 1960 to 2020. CO2 rises steadily from 317 ppm (1960) to 412 ppm (2020). Temperature anomaly rises from −0.1°C (1960) to +0.98°C (2020), with some year-to-year variability. Which of the following best describes the relationship between CO2 and temperature shown in Figure 2?
Correct Answer:
CO2 and temperature both generally increase over this period.
Question 1
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Prepare with the ACT Science Practice Questions - ACT Science Section (Enhanced ACT 2025) Exam practice quiz. This question bank includes 100 questions covering experiment, shows, student, figure, and water. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ACT Science Practice Questions - ACT Science Section (Enhanced ACT 2025) Exam

This practice set contains 100 questions from the matching question bank and focuses on experiment, shows, student, figure, and water. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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