ACT Science challenge

Read Scientist 1 and Table 1. Scientist 1 states day length alone sets onset at Day P plus 4 days and that neither cold nor moisture changes delay or starts process. Table 1 gives Treatment D first short day Day 8, so baseline Day 12. Added Days 9–11 cold leaves prediction unchanged. Day 9 mistakes cool-night onset, Day 11 mistakes drought onset for different treatment, and Day 16 mistakes day-length onset for different photoperiod treatments.

Count Table 2 water content under Scientist 3 definition plus both once-stated moisture sentences. Soil exceeded 12 percent Days 1–3, so counting starts Day 4. Treatment D shows Days 4–5 dry, Day 6 at 14 percent breaks, then Days 7–9 dry for three, so fifth requires Days 10–11 below 12 percent via after-Day-9 remains sentence, ending Day 11. Day 9 stops at last observed day ignoring remains sentence, Day 10 is off by one from miscounting break, and Day 8 assumes no break.

Translate Table 1 baselines through Scientist 3 earlier-of rule after deriving D from Table 2 and checking remains requirement. Treatment A fifth dry ends Day 8 but Day 9 at 14 percent cancels to baseline 16, Treatment B fifth ends Day 9 for drought 11 beating baseline 16, Treatment C fifth ends Day 10 for drought 12 tying baseline 12, and Treatment D fifth ends Day 11 for drought 13 losing to baseline 12. First set restates day-length baseline for wrong viewpoint, second set ignores cancellation and min rule, and fourth set restates cool-night onsets for wrong viewpoint.

Compare Day 11 to computed onsets for Treatment B: day-length 16, cool-night 9, and drought 11. Only drought matches, supporting baseline-plus-drought and contradicting other triggers. First choice cites true Scientist 1 principle but wrong day, second cites cool-night rule but predicts Day 9, and fourth confuses dry-day milestone Day 9 with onset Day 11 by omitting 2-day delay.

Check Treatment A baseline Day 16 against drought pathway with Table 2. Fifth dry ends Day 8 for drought onset Day 10, but Day 9 water at 14 percent exceeds 12 percent during required additional days and cancels drought to baseline Day 16. Thus both converge. Both-Day-12 choice mistakes cool-night onset for these viewpoints, 16-versus-10 choice assumes monotonic drying and misses reversal spike, and reversed numbers swap photoperiod treatments.

Read Table 1 pH 5 row and the introduction definition requiring blank minus coated. Blank 1.90 mg minus coated 0.75 mg gives 1.15 mg. The 0.75 mg value reports the coated remaining without subtracting the blank. The 1.25 mg value subtracts from the 2.00 mg starting mass and ignores the blank loss to container. The 1.90 mg value reports the blank remaining as if it were removal.

Table 2 cannot be read directly because the passage defines removal as blank minus coated. Subtracting gives direct removal of 1.40, 1.55 and 1.00 mg at 25, 40 and 55 degrees, showing increase then decrease. Recovery removal is 1.40, 1.35 and 0.90 mg, showing decrease in both intervals. The both-increase option ignores recovery decline. The direct-both-increase option ignores the drop from 40 to 55. The reversed option swaps the procedures.

Direct removal is blank minus coated, giving 1.00 mg at 55 degrees and 0.00 mg at 70 degrees where coated and blank both read 1.60 mg. The coating is therefore destroyed near 70 degrees and removal cannot become negative because coated sand then behaves like uncoated sand. The linear-continuation value assumes the prior drop continues past zero. The 55-degree value assumes a plateau ignoring the collapse. The 40-degree value uses the maximum from the wrong temperature.

Coating-attributed removal requires blank minus coated under matched chemistry and timing. Study 1 shows blank remaining changes with pH, Study 3 shows it scales with initial mass, and Study 2 defines recovery as cooling to 25°C for 2 hr before testing at 25°C. Only the pH 5, 25°C recovery, 4.00 mg blank matches the new test. The pH 7 blank mismatches acidity. The immediate 55°C blank uses direct timing rather than recovery timing. The 2.00 mg blank mismatches starting mass.

Table 3 gives fresh removal of 1.40 mg per 2.00 g and heated removal of 0.90 mg per 2.00 g at 2.00 mg initial, with blank 1.90 mg. Per gram contributions are 0.70 and 0.45 mg, summing to 1.15 mg for one gram each. Subtracting from the unchanged blank gives 0.75 mg remaining. The fresh-only value ignores heated sand. The heated-only value ignores fresh sand. The summed-remaining value adds 0.50 and 1.00 mg without halving for mass.

Table 3 removal is blank minus coated, giving fresh values 0.80, 1.40, 2.20 and 3.20 mg and heated values 0.55, 0.90, 1.40 and 2.40 mg. Doubling from 2.00 to 4.00 mg would require 2.80 mg fresh and 1.80 mg heated, but results show only 2.20 and 1.40 mg. The larger-at-larger statement is true but does not test doubling. The claimed doubled heated value does not occur. The lower-heated statement is true but does not address proportionality.

Read Table 1 where the two runs share food Day 4 but have light Day 11 versus light Day 7, and read the third viewpoint minimum of light plus 6 versus food plus 2. The decisive step is that food plus 2 gives Day 6 for both runs, which beats light plus 6 Day 17 and Day 13, so both fall to Day 6. The earlier in the light Day 11 run reflects crowding timing. The earlier in the light Day 7 run reflects light-only timing that ignores the food advance. The neither-develops option ignores that the food pathway alone suffices.

Read Table 1 for the run with light Day 11 and food Day 7, giving light plus 6 Day 17 and food plus 2 Day 9, and read the third viewpoint requirement that food stay low with temperature above 18 degrees through Days 8 and 9. The decisive step is that cold on Day 8 breaks the temperature persistence, so the food pathway fails and onset falls back to Day 17. The Day 8 timing uses the crowding viewpoint. The Day 9 timing applies food plus 2 while ignoring the temperature qualifier. The Day 13 timing matches light-only timing for a different run with light Day 7.

Read Table 1 to compute light plus 6 days 17, 17, 13, 13 and crowding plus 4 days 11, 8, 15, 8 and the minimum of light plus 6 versus food plus 2 days 6, 9, 6, 13, then compare with Table 2 observed days 17, 8, 6, 13. The decisive step is that only the Day 8 observed run in the second row matches crowding timing while missing light-only Day 17 and food-advance Day 9 by one day, which still counts as a miss. The Day 17 observed run matches light-only timing. The Day 6 observed run matches food-advance timing. The Day 13 observed run in the fourth row matches both light-only and food-advance timings.

Read Table 1 for the run with light Day 7, crowding Day 4, and food Day 11, giving predictions light plus 6 Day 13, crowding plus 4 Day 8, and minimum Day 13. The decisive step is testing each proposed single change including two-day food and temperature persistence. Moving light to Day 11 gives 17, 8, and 13, all different. Moving food to Day 7 looks like 13, 8, and 9, but cold on Day 8 breaks temperature persistence so the third prediction falls back to 13. Keeping food high leaves 13, 8, 13. Moving crowding to Day 7 gives 13, 11, 13.

Read Table 1 where both runs share light Day 11 but have food Day 4 versus food Day 7, and read the third viewpoint minimum with two-day persistence plus supplementation before visible cancels. The decisive step is checking windows Days 5 and 6 versus Days 8 and 9 against supplementation after Day 8. The first window completes and shows Day 6 before supplementation, so it stays Day 6. The second window loses Day 9 and supplementation precedes Day 9 visible onset, so it falls back to light plus 6 Day 17, giving 11 days difference. Three days ignores supplementation. Zero days wrongly cancels the already visible first run. Eight days reverses which run cancels.

Read L and K from Table 1 and the delay sentences. Scientist 1 adds 5 days to L: both L-10 cases have L 10, so both predict Day 15. Scientist 2 adds 6 days to K: the K-6 case predicts Day 12 and the K-4 case predicts Day 10, so the K-4 case is earlier. The both-earlier-in-one-case option reverses Scientist 2. The swapped-roles option assigns each scientist the other’s rule. The both-same option ignores the different K values and the reset rule.

Read the final listed Table 1 row with each onset rule. Originally the light rule and the wet-baseline rule both give Day 11 while the cold rule gives Day 10. Moving L to Day 12 makes the light rule give Day 17 and the wet-baseline rule give the earlier of Day 17 and Day 15, which is Day 15, leaving the cold rule at Day 10. Moving K alone leaves the light and wet predictions tied. Keeping soil dry leaves the light and wet-baseline rules tied at the light baseline. Moving L to Day 5 collapses all three at Day 10.

Read Table 1 L and W with the redrying sentence and Table 2 observed days. For the L-6 W-4 case with redrying on Day 9, light predicts Day 11 but wet predicts Day 7, and redrying on Day 9 occurs after Day 7, so the wet-baseline explanation still predicts Day 7, matching the observed Day 7 and contradicting the light-only explanation. The two L-10 cases observed on Day 15 match both the light baseline and the canceled wet pathway. The L-6 W-12 case observed on Day 11 matches both the light baseline and the canceled wet pathway.

Read the completed-sequence sentence and Table 1 K for the L-10 K-4 W-9 case. Three consecutive cold nights ending Day 4 predict Day 10, and later warming cannot cancel once the sequence is completed, so Day 10 agrees. The wet-baseline explanation predicts the earlier of Day 15 and Day 12, which is Day 12, so Day 10 disagrees. The light-only explanation starts counting from first long light day, not from cold nights. The reset option misapplies reset after completion. The wet-pathway option misorders Day 12 as before Day 10.

Read the five-day and redrying sentences with Table 1. The L-10 W-4 case reaches five wet days ending Day 4, so wet onset Day 7 occurs before redrying after Day 8, leaving onset Day 7. The L-10 W-9 case needs wet days through Day 9 to reach the fifth-day mark, but drying after Day 8 breaks the run, so no wet onset occurs and only the light baseline Day 15 remains. The difference is Day 15 minus Day 7. The zero option cancels both. The three-day option keeps original Day 12 for the second case. The five-day option keeps original Day 12 for the second case while keeping Day 7 for the first.

Read Table 1 L, K, and W with each delay rule under original schedules. The light-only rule adds 5 to L: the L-10 case gives Day 15 versus the L-6 case giving Day 11, so the L-6 case is earlier. The cold-only rule adds 6 to K: the K-6 case gives Day 12 versus the K-10 case giving Day 16, so the K-6 case is earlier. The wet-baseline rule takes the earlier of light-plus-5 and wet-plus-3: the first case gives Day 7 versus the second giving Day 7, so same day. The reversed-light option flips the first comparison. The moved-tie option moves the tie to the cold rule. The doubly-misordered option misorders both light and cold.

Table 1 gives 58.0 g swollen mass for uncoated distilled gel at 40°C. The text states uncoated trials began with 10.0 g dry gel, so absorbed water is 48.0 g total. Agronomists compare per gram dry gel, so dividing by 10.0 g gives 4.8 g per gram. The 48.0 response reports total water without the per-gram division. The 58.0 response reports swollen mass directly without subtracting dry mass. The 4.4 response correctly computes per-gram uptake but for coated gel at 40°C from Table 2, which is the wrong condition.

At 30°C Table 1 gives distilled swollen mass 50.0 g and salt swollen mass 34.0 g. With 10.0 g dry gel, absorbed waters are 40.0 and 24.0 g, or 4.0 and 2.4 g per gram dry gel. The salt deficit is 1.6 g per gram. The 16.0 response reports the total-water difference without dividing by dry mass. The 2.4 response reports the salt-water per-gram value alone rather than the difference. The 4.0 response reports the distilled-water per-gram value alone rather than the difference.

At 30°C uncoated distilled swollen mass is 50.0 g for 10.0 g dry gel, giving 40.0 g water or 4.0 g per gram. Table 2 coated swollen mass is 49.0 g for 12.0 g dry material with 10.0 g gel, giving 37.0 g water or 3.7 g per gram gel. The uncoated excess is 0.3 g per gram. The 1.0 response reports the swollen-mass difference without accounting for different dry masses. The 3.7 response reports the coated per-gram value alone. The 4.0 response reports the uncoated per-gram value alone.

Per-gram uptake for uncoated distilled gel is 3.2, 4.0, 4.8, and 3.6 g per gram at 20 through 50°C, rising to 40°C then falling. For coated gel it is 3.0, 3.7, 4.4, and 3.3, also rising to 40°C then falling but lower at every temperature including 20°C. The response with both falling reverses the direction. The response with equality at 20°C is true of swollen masses, both 42.0 g, but false for per-gram uptake. The response with opposite trends and a crossing invents a coated rise-fall reversal and a crossing that the tables do not show.

Table 1 at 50°C gives 46.0 g distilled and 32.0 g salt swollen mass for 10.0 g dry gel, so absorbed waters are 36.0 g and 22.0 g for a 14.0 g salt reduction. Table 2 gives 45.0 g coated swollen mass for 12.0 g dry material with 10.0 g gel, so coated distilled water is 33.0 g. Subtracting the same 14.0 g gives 19.0 g water plus 12.0 g dry material for 31.0 g. The 32.0 g response repeats uncoated salt mass from the wrong condition. The 45.0 g response repeats coated distilled mass ignoring salt. The 29.0 g response adds only 10.0 g gel omitting the 2.0 g coat.

The coat claim requires higher per-gram uptake with coating. Using 10.0 g gel for both series, uncoated distilled per-gram values are 3.2, 4.0, 4.8, and 3.6, while coated values are 3.0, 3.7, 4.4, and 3.3, lower at every temperature, which weakens the claim. The response with coated swollen mass greater is false since coated swollen masses are equal or lower. The response citing salt versus distilled uptake is true but tests salinity, not coating. The response citing the shared 40°C peak is true but tests temperature, not coating.

Read Table 2 and subtract each direct blank from its direct extract to get corrected yields; the largest is 13.0 mg at 45°C, not the raw maximum at 60°C. At 45°C the recovery corrected yield is 10.4 minus 0.4 equals 10.0 mg. Read Table 1 and subtract blanks to get the Study 1 maximum of 11.4 minus 0.4 equals 11.0 mg at pH 6. The difference is 1.0 mg. The 2.0 mg value compares the two maxima directly, the 3.0 mg value compares direct versus recovery at 45°C, and the 6.0 mg value uses the raw-maximum temperature.

Read Table 2 and subtract the matching blank for every entry before judging direction. Direct corrected yields rise from 11.0 mg at 30°C to 13.0 mg at 45°C and then fall to 10.5 mg at 60°C. Recovery corrected yields fall from 11.0 mg to 10.0 mg and then to 5.0 mg over the same intervals. Raw direct masses rise over both intervals, which tempts the wrong trend. The both-increase-then-decrease choice misstates recovery, the both-increase choice uses raw direct masses, and the reversed choice swaps the procedures.

Calculate corrected yields by subtracting the 0.4 mg blank in Table 3. Fresh corrected values are 8.0 mg at 5 g/L and 11.0 mg at 10 g/L. In Study 2 the 60°C recovery corrected yield is 5.4 minus 0.4 equals 5.0 mg, so twice that target is 10.0 mg. Linear interpolation gives 5 plus 5 times 2.0 divided by 3.0 equals about 8.3 g/L. The 2.5 g/L choice matches a near-table value without doubling, the 9.0 g/L choice repeats the calculation with raw masses, and the 10.0 g/L choice selects the nearest table concentration without interpolating.

Study 3 reactions occur at pH 6 normally, but the new test specifies pH 5 and 20 g/L starch with recovered 60°C extract, whose reaction occurs at 30°C after cooling. The matching blank must share the reaction pH, reaction temperature, starch concentration, and timing while lacking extract. Only the pH 5, 30°C, 20 g/L blank satisfies all conditions. The pH 6 choice retains the old Study 3 pH, the 60°C choice confuses pretreatment temperature with reaction temperature, and the 10 g/L choice retains the old starch concentration.

Read Table 3 at 10 g/L starch and subtract the 0.4 mg blank to obtain corrected yields of 11.0 mg for fresh extract and 5.0 mg for heated extract for 0.5 mL. Scale by volume fraction to 0.10 mL fresh as 0.2 times 11.0 equals 2.2 mg and 0.40 mL heated as 0.8 times 5.0 equals 4.0 mg. Add the contributions to 6.2 mg and add the unchanged blank to report 6.6 mg. The 6.2 mg choice omits the blank, the 7.0 mg choice scales raw masses then adds the blank again, and the 8.4 mg choice assumes equal halves.

Subtract the Table 3 blank to test doubling exactly. Fresh corrected yields are 4.0, 8.0, 11.0, and 12.5 mg across 2.5, 5, 10, and 20 g/L, while heated yields are 2.5, 4.0, 5.0, and 5.8 mg. Doubling from 10 to 20 g/L raises fresh yield only from 11.0 to 12.5 mg, so the every-doubling rule fails. The doubling from 2.5 to 5 g/L is real but does not establish the throughout claim, the every-increase observation is true but does not test doubling, and the heated-below-fresh observation is true but irrelevant to the doubling claim.

Read Table 1 Treatment C timing L6 K10 S4 with delays L+5 K+5 S+3, then Table 2 observed Day 11 with warm water and high salinity so qualifiers pass. Scientist 1 predicts Day 11 which matches observed, Scientist 2 predicts Day 15 which is four days late, Scientist 3 predicts Day 7 which is four days early. The second option misreads K timing as matching, the third ignores that high salinity should have advanced hatching, the fourth wrongly adds Scientist 3 whose early prediction fails.

Scientist 1 sets hatching at Day L+5 when water stays above 18 degrees, and Table 1 gives Treatment B L10 so predicted Day 15 under the stated warm assumption. Table 2 temperature is not needed because the stem stipulates warm water. The 9-day option uses K+5 or S+3 from the wrong pathway, the 11-day option uses L+5 for Treatments C or D with L6, the 7-day option uses S+3 for Treatments A or C.

Table 1 gives Treatment A L10 and Treatment C L6 so Scientist 1 L+5 predicts Day 15 versus Day 11 with Treatment C earlier, while Treatment A K6 and Treatment C K10 gives Scientist 2 K+5 predicting Day 11 versus Day 15 with Treatment A earlier under stated assumptions that remove Table 2 cold and dilution effects. The first option extends Scientist 1 order to Scientist 2, the second extends Scientist 2 order to Scientist 1, the fourth swaps both orders by misreading L and K columns.

Scientist 1 allows only Day L+5 when warm and delay beyond L+5 when cold, explicitly denying that cool nights or salinity can start early hatching, with Table 1 Treatment A L10 giving L+5 Day 15. Table 2 shows cold 14 degrees plus Day 7 hatching eight days before L+5, which contradicts exclusivity despite qualifier failure. The second option misreads the qualifier as excusing early hatching, the third misstates K timing and direction since Day 7 precedes K+5 Day 11, the fourth reverses chronology because Day 7 is before not after Day 11.

Scientist 3 predicts the earlier of L+5 and S+3 without dilution, with Table 1 Treatment C L6 giving L+5 Day 11 and S4 giving S+3 Day 7 so undiluted prediction is Day 7. Dilution on Day 5 occurs before Day 7 and cancels the salinity pathway while leaving daylight baseline intact, so prediction reverts to Day 11. The 7-day option ignores dilution, the 9-day option uses S+3 for Treatment B, the 15-day option uses K+5 for Treatment C from the wrong scientist.

Table 1 gives Treatment B L10 and Treatment D L6 so Scientist 1 L+5 predicts Day 15 versus Day 11 with Treatment D earlier, Treatment B K4 and Treatment D K4 gives Scientist 2 K+5 predicting Day 9 versus Day 9 same day, and Scientist 3 earlier-of gives Treatment B Day 9 from S6+3 versus Treatment D Day 11 from L+5 because Treatment D S10+3 Day 13 exceeds L+5 and Table 2 dilution confirms salinity does not advance Treatment D. The second option rotates correct relations forward, the third rotates them differently using wrong scientist order, the fourth swaps Scientist 2 and Scientist 3 relations by confusing K and S timings.