ACT Past Papers with Answers

. Considerino only the gases listed in Table I, w,"hich gas simultaneously composes the laTtFest perc¢.nt of Mars's atmosphere and the smallest percent of Earth's atmosphere?

. Based on th¢ description of the procedvres ill the stud- ies. the scientists had to exlract complete and intact fo6sil snail shells.inslead of fossil shell fragments fro the rock Idyers in order to: rnaLe accurate measurements of each shell's dimensions, ' H. de.tennine the present-day climate of Bonin Is1￿]d. determine the rock layers,. ages using radiocarbon dating. 1!8 30 28 40 3.f 70. 25 20 15 10 dge of sliells I'thcTrus¢U)d.s of ve8J"% before prL"8ent) Figure 2

Based on the description of s.tudy I, whicb of ihe tol- lowing fiqures inost likely represent.s Ihc appearance of the B, L, B, B stripe pattern on a snail shelJ? Table and figure5 adapted from SaloGhi Chiba, 'A 4D,OOD-y&ar Record. of Discontinuous Evolution ol Island Snails. Q1996 by The Paleontological Society. l. According to the results of Study 2, the average shell diameter of fossil Snail shells with an age of 30,000 years is clo.8est to ￿1h1¢h of the followillg .

According to the regults of Study 2, how do the avcr- age numbeT of w.horls and the average shell diameter for livino Bonin Island snails Compare to those of fossil Ilonin Island snails with an age of 40,000 years? For the living snails: shell diameLer ar¢ larger. G, both the average number of w'horls and the aiieraoe. shell diameter are snialler. the a&erd(re number of whorls iq larger and the avei."a8e shell diameter is smaller. the averatre llumber of whorls is sn]aller and the aryjeraoe shell diameteT is lai(Ter.

A ivhite-eyed feiTSale has which of the followints genotypes? Fejnales: l 00*1 red-eyed. ales.. 100% r¢d-eyed. .J. x°Y ExperEn2ent 2 Fifry female offspring and 50 rnale oflsprirjg frorn Experiment I w'ere mated iogeiher. The results iiiere as follows".

Some or alj of Ihe rnale offspring had I white-eye alleIe in Experiments. and 3 onl),. remales: 100 /D red-eyed. Mal.es: 50(A red-eyed. 50 /0 whiie-eiTed.

Siippose Ihat 1.000 offsprino were produced in Experi- ment 3. Based on Ihe results, the niiinber of red-eyed male olfsprincF prodvced ln FAperiment 3 would moq[ li.Fely h4I7e been clo.Eest io: Ei"pep-i711eni 3 Fiftv i'enalL off spriiig froiii Eqxpei'i3nent l N<ere mated iiiiih 50 14Fhite_eiied mal es. The Tesults ￿'ere as follows: Fenia]e.: 509c, red-e)'ed. So￿,￿ ￿,hIte-C3,"ed., dles: /() red-G)'ed; iO(r /0 ivhite-eye.d. 4ooooov•ooo4

Source question 15. Refer to the source image.

Consider a horizontal pipc of iiarying diameter that LS filled K-,ith heliu.m LFas flowing throuilh the pipe. The speed of the gas in n]eters per second (mlsec) and the pressure of ihe gas in atynospheres (atjn) at 3 locations in the pipe are given in the followTing iable. atm.ospheric pressure venti)ii pressure Speed (In/sec) Pressurc (atm) Location Based on the inforinatiorj in the passaae about air flow, in a carburetor. Mihich of the folloivillg draikings most liLel31 represents the changes in the pipe's diameter?

For the carburetors used in Experiment 2 With venturi radii of 0.8 cm: 1.2 cm, and 1.6 crn, which of the fol- lowing .£ri"aphs best displays the atmospheric pressure al each air inle.t and the presKure rneasured in each venturi? Key

Source question 19. Refer to the source image.

Source question 20. Refer to the source image.

A sc.ielltist claime.d that whenever water is heated, it will ex'pand. Basea on Tables l and 2, is his claiiii ialid? chanoe in iiolunie was posltive. cFiantse in ￿'0Ill]ne Wcts neoatii e. Yef" ii,'Iien MidLer llkas heated Irom -16°C to 94°C, the cliantse in i'oliime Ilias po.%itiiJe. chaiioe in ipolunie iè.ias ne(rai'ii'e.

Source question 23. Refer to the source image.

Accordlng to Figure I, the temperature of Mars's atrnosphere cbangeg the most between: 25 km and 50 km. 75 km and 100 km.

Source question 25. Refer to the source image.

I4'hich of the f.ollowino Stat¢￿entS about 02 ill the atmospheres of the 3 planets is supported by the data in Table l ? . quantities of O quantities of O

Based on Table 2, the 8verage temperaturé at 'Venlls' $urface withoui greenhouse, Wdrming Would be how mally degrees cool.er than: the. teniperature given in Figure 1 7

Both confinement methods consurne large amounts. of ener(ry ill order to: . -ause fusion betHpeen nuclei. increase thc distaDces between nuclei. A7ucleaF"fusioiz is Ihe combinincf of the nuclei (central Cores) of atoms and can be used t.o produce energy. Differ- ent Duclei contain various numbers of proions (particles with a . sinole p..osiljva electrical c.h<irge) and llÉu£rons (unchai'ged particles). A containmenf ijessel hold8 a tnixture of deuierÉu nuclei (containing I proton an'd I neutron) and ti'itium nuclei (containin I proton and 2 neutrons). (The density, 71, gs rhe nvniber of nucJei/cm hig,Iier densities inci'ease the frequency of collisions between nuclei..) The nuclei col- lide, fuse, and e.mit Iiigli aiiiouiits of energy. Be.cause like- charged particles i'epel each otber, gerting two nuclei close enougl) to eacli other to fii8e requires 1h-at.tlie niiclei be dLcelerated to hitrh .8peeds, Bihic'h congumes cner,gy. More- ove.r. ei)erEy ik consunied in pre.venting Lhe nllclei frorn sti'ikino the w8J.l.t of tlie containmen.t vessel, Ivhere the nu.clci woiild lose %pe¢d.

AL'cordiiig to tFie passage, for t.he Magnetic Confine- rnent Jqeihod approximately wliat is the vajue of T ? F, 10- 10 sec sec sec .sec To produce niore tinergy from fiisioD Ih¢l1} Is c.ansiiEned, the te,mperature mu.8t be rnaintdinod aboire 4 x J O K for a nii.nilliuin time, T, and the product of n and r iT).USL excccd 10 8ec/um ' (a reoiiireillent call ed Laikjson's c'rilc￿l"IOn Thvo method.9 for copifi2ie177ent (preve,nlin ¢7 iiuclci from colliding ivilh vessel ivalls) ai)d for produciiiu T]uclear fusion are discussed lTrelow. 31; For bntli confinemeiil 'LrJel.hods, fusing deuterium i)uclei is diffiLull because ihe nuclei hdve identical: chai'ges. iiia8ses. .ppeeds. wei ohl'.s. Tlie Ala.gnefic Confinement Alieihod A inagnetic force fiejd compresses a gdg of tritillin and de,uterium iiu.cJei. Ee.caube excessive (ras densilie.s Will cause the. niagiiclic f2eld to byclde, allnwints the g.<lS to escai)e LODfiiieiiient aDd to strike the wall s of the c.onlELin- Inent ipessel, a maxirnum n of about 10 14 lluclei/cm is aljowed. Theref'ore, in order to satisfj: Lawson'.s criterion, tempe.raiure of KLppfoxiinaltly 10 K is maintained for about I sec,

Source question 31. Refer to the source image.

To incredse the probabilily that nuclei will collide, a goal of both melhodo is to.. veBsel. essel. increase dje density of lluclei in the containment ve8%el. increa£e Lhe number of ucutrons in the nuclei. The Laser Confinemc311 Mezhod A pellet COlltaininE deuleriiin] and tritiDm atoms i Rubjected to pDlses of laser lioht:.pi-oducin(T a gas witli a density of about l O 13 nucleilcin,. The laser pulses are shaped t.o conipress and heat the gas to approxirnately J O K for about 10- sei. lJnfortunatel)I some of the Jaqey enerirji is reflected rather than'abf orbed by thc gas.

A c.OlllPdfison of ihe densilies of the deuteriumliriliun] cyas for tlie two rnerhods sl)c)WS that the: JIEheT den%ilies. higher densitÈes. deiisities. tTh'o rnetFtods usually produce equal densitics. At pi'esent, Ihe ratio of poiver (enerryy per unit li.me) produced to ihe poTh;er consumed by the Nqagrjetic Confine- ment h4e.lhod is higher than that bs, the La<er Confinement 4ethod. However, bew8ufe os Lhe iier), hioh denfity oi nuclei around Lhe pellel, Ihe pollier produced by the Ldser Confinement .Method C&n be hi<yher chan thdL of niagneuc confineinent. 40000000004

In the Laser Confinement M=thod, l.aser lioht is used to:

0 36.2 )6.4 36.6 36.8 37.0 37.2 37.4 37.6 illteTllal head trmperature (°C)

Source question 38. Refer to the source image.

E a.qed on Figure I, if an indii'idual has an internal head temper<Lture of .?6.8°C and a skin temperature of 29°C, Ilie indiiiidual's heat production is most likel)I closest to which of the following? JO rA/sec -38. .4ccording to Finure 2, at a sliin temDerature of 32°C, as internal head temperature increases fTom J6.2°C to 3 1.O°C, eiJaporatllFe heat loss: re￿￿1.n5 conslant, then decieases. remaiAiS constarit. then inci"eases. increa8es. the.n deci"edses. decTe.ases, then increa8es. END OF TEST 4 STOP! DO NOT RETURN TO ANY OTHER TEST. 2006年12⽉月ACT试题（63D）答案 English Mathematics Readling Science 1 C 36 J 1 A 31 C 1 B 1 C 2 J 37 C 2 J 32 J 2 J 2 G 3 B 38 F 3 E 33 D 3 C 3 D 4 G 39 C 4 J 34 H 4 F 4 G 5 A 40 G 5 D 35 D 5 D 5 B 6 J 41 C 6 H 36 G 6 G 6 H 7 B 42 F 7 B 37 C 7 A 7 A 8 G 43 D 8 H 38 K 8 J 8 F 9 B 44 G 9 C 39 A 9 C 9 D 10 J 45 A 10 H 40 H 10 H 10 G 11 C 46 G 11 B 41 A 11 C 11 D 12 J 47 B 12 J 42 K 12 F 12 J 13 B 48 G 13 E 43 A 13 C 13 B 14 J 49 A 14 G 44 K 14 F 14 F 15 A 50 G 15 B 45 E 15 A 15 A 16 F 51 C 16 K 46 G 16 H 16 J 17 D 52 H 17 E 47 E 17 D 17 B 18 J 53 C 18 H 48 G 18 G 18 G 19 A 54 J 19 E 49 E 19 D 19 C 20 F 55 A 20 J 50 F 20 J 20 F 21 D 56 H 21 B 51 E 21 C 21 D 22 H 57 A 22 F 52 G 22 G 22 H 23 D 58 G 23 C 53 D 23 D 23 A 24 H 59 C 24 J 54 K 24 G 24 H 25 C 60 F 25 A 55 C 25 A 25 A 26 F 61 B 26 H 56 J 26 H 26 J 27 B 62 H 27 A 57 A 27 D 27 D 28 F 63 D 28 G 58 G 28 G 28 H 29 C 64 F 29 A 59 A 29 D 29 A 30 G 65 C 30 F 60 H 30 J 30 H 31 C 66 F 31 A 31 A 32 J 67 D 32 G 32 H 33 B 68 H 33 C 33 B 34 H 69 D 34 H 34 G 35 A 70 F 35 D 35 D 71 D 36 F 36 H 72 F 37 D 37 C 73 A 38 F 38 G 74 J 39 C 39 A 75 A 40 G 40 F