- Based on Figure 1, the two catalysts give the most nearly equal rates at which temperature?
Answer: 50 °C
The gap between the two catalysts in Figure 1 is 1.4 mmol per minute at 20 °C, 1.4 at 30 °C, 0.7 at 40 °C, and 0.1 at 50 °C. The rates are closest together at 50 °C, where Catalyst X has caught and overtaken Catalyst Y.
- Based on Figure 1, the count of which group increased by the greatest factor after restoration?
Answer: Wading birds
Dividing the after count by the before count gives about 2.3 for frogs (28 ÷ 12), 1.4 for dragonflies (55 ÷ 40), 3.7 for wading birds (22 ÷ 6), and 1.1 for fish (20 ÷ 18). Wading birds increased by the largest factor even though frogs and wading birds gained the same number of individuals.
- Based on Figure 1, the urban concentration is closest to 3 times the rural concentration in which month?
Answer: January
Dividing the urban value by the rural value for each month gives 54 ÷ 18 = 3.0 for January, 35 ÷ 14 = 2.5 for April, 28 ÷ 15 ≈ 1.9 for July, and 38 ÷ 19 = 2.0 for October. Only January reaches a ratio of 3. Note that October has the second-highest urban reading but the second-lowest ratio, so the urban bars alone do not settle the ranking.
- Based on Table 1, 8 hours after watering the clay soil retains approximately how many times as much water as the sandy soil?
Answer: 2.1 times
At 8 hours, Table 1 shows the clay soil holding 78% of the water added and the sandy soil holding 38%. Dividing, 78 ÷ 38 ≈ 2.1. The clay soil holds about twice as much of its water at that time.
- A biology class examined plant growth under different light colors. Table A shows mean plant height after 14 days under red, blue, or white LEDs (n\=10 per group). Table B shows mean leaf count after 14 days under the same light treatments (n\=10 per group). Compare what variable each table measures.
Answer: Table A measures height in centimeters, while Table B measures leaf number under the same light treatments and duration.
Table A and Table B measure different growth variables under identical light treatments and durations to compare aspects of plant response. Table A reports mean plant height in centimeters (cm) after 14 days under red, blue, or white LEDs with n\=10 per group using a ruler; Table B reports mean leaf count (unitless) after 14 days under the same conditions and sample size via visual inspection. This distinction matters because height reflects vertical growth while leaf count indicates developmental progress, allowing multifaceted analysis of light effects. A distractor might suggest different treatments or variables like intensity, but both tables share the same light colors and time frame.
- According to Figure 1, at which wavelength do the two paints reflect the same percentage of light?
Answer: 650 nm
The two curves in Figure 1 meet at 650 nm, where both paints reflect 84% of the light. Below 650 nm the white paint reflects more, and at 700 nm the beige paint reflects more (86% against 83%), so the curves cross exactly once.
- According to Figure 1, over the 8 weeks the mass gained on Diet B was approximately how many times the mass gained on Diet A?
Answer: 2.3 times
Both groups started at 20 g. Over 8 weeks the Diet A group reached 33 g, a gain of 13 g, and the Diet B group reached 50 g, a gain of 30 g. Dividing, 30 ÷ 13 ≈ 2.3. Comparing the final masses instead of the gains would give about 1.5, which is why that option is close but wrong.
- Based on Figure 1, the difference between the surface and bottom measurements is greatest in which month?
Answer: July
Subtracting the bottom measurement from the surface measurement gives 0.6 mg/L in April, 1.0 mg/L in May, 3.0 mg/L in June, and 6.6 mg/L in July, then 5.8 mg/L in August and 0.4 mg/L in September. July shows the largest separation. The bottom water is at its lowest in August rather than July, so the bottom series alone does not identify the answer.
- According to Table 1, how much more runoff did the paved watershed produce than the forested watershed after 30 mm of rainfall?
Answer: 17 mm
At 30 mm of rainfall, Table 1 gives 23 mm of runoff from the paved watershed and 6 mm from the forested watershed. The difference is 23 − 6 = 17 mm. The other options are values read straight off the table without subtracting: 15 mm and 23 mm and 32 mm are the forested runoff at 50 mm of rainfall and the paved runoff at 30 mm and 40 mm.
- A public health team summarized flu vaccination in two age groups. Table A shows counts of vaccinated and unvaccinated people in a sample of adults ages 18–49. Table B shows percentages vaccinated and unvaccinated in a separate sample of adults ages 65+. Determine how the tables differ in both population and reporting format.
Answer: Table A gives counts for ages 18–49, while Table B gives percentages for ages 65+ from a different sample.
Table A and Table B differ in both the age groups surveyed and the format of reporting vaccination status. Table A reports counts of vaccinated and unvaccinated individuals in a sample of adults ages 18–49; Table B reports percentages of vaccinated and unvaccinated in a separate sample of adults ages 65+. This difference matters because counts show raw sample sizes while percentages normalize for comparison, and separate age groups highlight demographic variations in vaccination rates. A distractor might reverse the age groups or formats, but the captions clearly assign counts to younger adults in A and percentages to older in B.
- Based on Figure 1, the yield with Fertilizer B first exceeds the yield with Fertilizer A between which two application rates?
Answer: 60 and 80 kg per hectare
At 60 kg per hectare, Fertilizer A yields 4.6 tonnes and Fertilizer B yields 4.2 tonnes, so A is still ahead. At 80 kg per hectare, B yields 5.0 tonnes against A's 4.8 tonnes. The curves cross between those two rates. Fertilizer A's yield levels off after 60 kg per hectare while Fertilizer B's keeps rising.
- Based on Table 1, how do the errors of the two thermometers compare as reference temperature increases?
Answer: Thermometer 1's error stays about the same size while Thermometer 2's error grows larger.
Thermometer 1 reads 0.2 °C above the reference at every temperature in Table 1, from 0 °C through 100 °C, so its error is constant. Thermometer 2 reads 0.1 °C high at 0 °C but 3.1 °C high at 100 °C, with the error growing steadily in between. Only Thermometer 2's error depends on temperature.
- An oceanography lab compared salinity measurements from two instruments. Table A shows salinity measured in practical salinity units (PSU) using a conductivity probe. Table B shows chloride concentration measured in g/L using a titration method at the same depths. Identify the primary difference in what is being measured and how.
Answer: Table A measures salinity (PSU) with a conductivity probe, while Table B measures chloride (g/L) by titration at the same depths.
The main difference lies in the specific property measured and the method used, even at the same depths. Table A reports salinity in practical salinity units (PSU) using a conductivity probe during a cast; Table B reports chloride concentration in g/L using lab titration of samples. This distinction matters because salinity estimates total salts via conductivity, while chloride measures one component chemically, affecting how data are interpreted for ocean properties. A distractor could swap the methods or variables, but the captions specify conductivity for salinity in A and titration for chloride in B.
- Based on Table 1, the two alloys are closest in tensile strength at which carbon content?
Answer: 0.2%
The differences in Table 1 are 40 MPa at 0.1%, 10 MPa at 0.2%, 20 MPa at 0.3%, 50 MPa at 0.4%, and 75 MPa at 0.5%. The smallest difference, 10 MPa, is at 0.2% carbon, where the alloys are closest in strength.
- Based on Figure 1, the difference between the activity of Enzyme A and the activity of Enzyme B is greatest at which pH?
Answer: pH 6
Reading the paired bars in Figure 1: at pH 2 the difference is 60 − 4 = 56 units; at pH 4 it is 44 − 18 = 26 units; at pH 6 it is 80 − 10 = 70 units; at pH 8 it is 58 − 6 = 52 units. The largest gap, 70 units, occurs at pH 6.
- Based on Figure 1, the output of Panel A first exceeds the output of Panel B between which two tilt angles?
Answer: 30° and 45°
At 30°, Panel B produces 305 W against Panel A's 282 W, so B is still ahead. At 45°, Panel A produces 310 W against Panel B's 295 W. The curves cross between 30° and 45°. Panel A is already ahead at 45°, so no later interval can contain the first crossing.
- Based on Figure 1, the solubility of Compound Y first becomes greater than the solubility of Compound X between which two temperatures?
Answer: 40 °C and 50 °C
At 40 °C, Compound Y (27 g/100 mL) is still below Compound X (32 g/100 mL). At 50 °C, Compound Y (40 g/100 mL) is above Compound X (36 g/100 mL). The curves therefore cross between 40 °C and 50 °C. Compound Y is lower at every temperature at or below 40 °C and already higher once 50 °C is reached.
- According to Figure 1, at 80 km/h the wet-road braking distance is approximately how many times the dry-road braking distance?
Answer: 1.7 times
At 80 km/h, Figure 1 gives a wet-road distance of 92 m and a dry-road distance of 55 m. Dividing, 92 ÷ 55 ≈ 1.7. The car needs roughly 1.7 times as much distance to stop on the wet surface at that speed.
- Based on Figure 1, which species' germination changed more between 30% and 40% soil moisture?
Answer: Species Q, which changed by 28 seeds
Between 30% and 40% moisture, Species P falls from 78 to 70, a change of 8 seeds, while Species Q falls from 80 to 52, a change of 28 seeds. Species Q changed by the larger amount.
- According to Figure 1, the trained group first falls to or below the untrained group's 5-minute heart rate at which time?
Answer: 2 min
The untrained group's heart rate 5 minutes after exercise is 114 beats per minute. The trained group is at 128 after 1 minute and 108 after 2 minutes, so 2 minutes is the first reading at or below 114. The trained group reaches in 2 minutes what takes the untrained group the full 5 minutes.
