Released Test Questions Science 8

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1 LIFORNI STNRS TEST G R E Released Test Questions Science 1 istance (eters) The raph below shows the oveent of an object at several points in tie. Object Moveent Tie (inutes) What is the averae speed of the object? 25 2 ata fro an experient are presented below. Experiental ata 40 istance (c) istance Tie 30 5 c 0.2 s c 0.4 s 25 c 0.6 s c 0. s 0 Experiental ata Tie (s) The slope of the raph represents what characteristic of an object? displaceent force speed inertia SZ eters inute 2 eters inute 25 eters inute 50 eters inute SZ sprin scale is pulled downward and readins are recorded. istance Pulled ata Table Sprin Scale Readin 1.0 c 4 N 1.5 c 6 N 2.0 c N 2.5 c 10 N If the sprin is pulled 3.5 c, the sprin scale should read 12 N. 13 N. 14 N. 15 N. 9 This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education. SZ2055

2 G R E Science 4 student records the ass and volue of a lup of clay, x. Next, a second lup of clay, y, is added to lup x, and the cobined (x + y) ass and volue are recorded. Finally, a third lup of clay, z, is added to the cobined (x + y) ixture, and the final ( x + y + z) ass and volue are recorded, as shown below. lay Transforation Graph LIFORNI STNRS TEST 6 Released Test Questions n athlete can run 9 kiloeters in 1 hour. If the athlete runs at that sae averae speed for 30 inutes, how far will the athlete travel? 1 kiloeters 9 kiloeters 4.5 kiloeters 3.3 kiloeters Mass () x x + y + z x + y Volue (c 3 ) What is the ost loical conclusion about the clay used in this investiation? 7 SZ3033 How uch tie is required for a bicycle to travel a distance of 100 at an averae speed of 2? s 0.02 s 50 s 100 s 200 s Lup z had the reatest ass. SZ20740 Lup z had the lowest density. Lup y had the lowest density. Which of the followin represents the velocity of a ovin object? Lup y had the reatest ass. SZ Red-clay bricks have a density of approxiately k k ir has a density of Which of the followin has the lowest ass? 40 north 40 s 2 3 of bricks 4 3 of bricks 40 north s of air SZ , of air SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

3 LIFORNI STNRS TEST G R E Released Test Questions Science 9 Which characteristic of otion could chane without chanin the velocity of an object? 11 The raph below shows the speed of a vehicle over tie. the speed the position the direction the acceleration SZ The raph below shows how the position of an object chanes over tie. Speed ( ) s The Speed of a Vehicle Position vs. Tie Tie (s) Position () 9.0 How far did the vehicle travel durin the first two seconds? Tie (s) SZ20746 What is the speed of the object durin the tie interval fro 4 seconds to 10 seconds? 2 s 3 s s 16 s SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

4 G R E Science 12 force is actin on each of the objects below. 3 N 3 N 3 N What can be concluded about these forces? LIFORNI STNRS TEST Released Test Questions 14 ball is dropped fro the top of a tall buildin. s the ball falls, the upward force of air resistance becoes equal to the downward pull of ravity. When these two forces becoe equal in anitude, the ball will flatten due to the forces. fall at a constant speed. continue to speed up. slow to a stop. They are the sae because they point toward the objects. They are the sae because they have the sae anitude. They are different because they have different anitudes. They are different because they have different directions. SZ Two students are pushin a cart, as shown below. SZ Four forces are actin on a box, as shown below. 40 N downward 20 N to the 30 N to the left riht 10 N upward This box will increase in speed 200 N 150 N downward and to the left. downward and to the riht. upward and to the left. upward and to the riht. The cart will ove as if it were acted on by a sinle force with a anitude of SZ N. 150 N. 200 N. 350 N. SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

5 LIFORNI STNRS TEST G R E Released Test Questions Science 16 force of 5 N is required to increase the speed of a box fro a rate of 10. to 3. 0 within s s 5 s alon a level surface. What chane would ost likely require additional force to produce the sae results? reduce the ass of the box increase the ass of the box ake the surfaces of the box sooth ake the surface of the floor sooth SZ What is the density of a 64- iron cube that displaces L of water? 1 piece of pine wood floats on the surface of a lake because the water exerts an upward force equal to the weiht of the wood. a downward force equal to the weiht of the wood. an upward force equal to the weiht of the displaceent water. a downward force equal to the weiht of the displaceent water. SZ The followin table shows properties of four different saple aterials. One of these aterials is cork, a type of wood that floats in water. 512 L 32 L L 4 L Physical Properties Saple Nuber Mass Volue L L L L SZ3034 Given that the density of water is 1, which L of the saples is ost likely cork? SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

6 G R E LIFORNI STNRS TEST Science Released Test Questions 20 The densities of four different woods are shown below. 22 Which of the followin is found farthest fro the center of an ato? Wood Saple ensities Type of Wood ensity ( ) c 3 frican Teakwood 0.9 alsa 0.14 edar 0.55 Ironwood 1.23 Which wood will sink when placed in a fluid with a density of 114.? c 3 frican teakwood balsa cedar ironwood SZ Which of the followin best describes an ato? protons and electrons rouped toether in a rando pattern protons and electrons rouped toether in an alternatin pattern a core of protons and neutrons surrounded by electrons a core of electrons and neutrons surrounded by protons nucleus proton neutron electron SZ When anesiu (M) etal is burned in the presence of oxyen (O 2 ), anesiu oxide (MO) is produced. The properties of anesiu oxide are different than the individual properties of anesiu and oxyen because anesiu oxide is a solution. a ixture. a copound. an eleent. SZ Within a substance, atos that collide frequently and ove independently of one another are ost likely in a liquid. solid. as. crystal. SZ2027 SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

7 LIFORNI STNRS TEST G R E Released Test Questions Science 25 cetic cid (Vinear) O H 3 O H 2 diara of the periodic table of the eleents is shown below. Periodic Table of the Eleents 3 1 What is the nae of the indicated ato in the acetic acid olecule shown above? 4 carbon calciu chroiu copper 2 In which reion of the table would nonetals be found? SZ Iron oxides, such as rust, for when iron etal reacts with oxyen in the air. What are the cheical sybols for the two eleents found in iron oxide? I and O Ir and O Fe and O Pb and O SZ What do the eleents sulfur (S), nitroen (N), phosphorus (P), and broine (r) have in coon? SZ The table below shows the atoic ass of four stable calciu (a) isotopes. Isotope toic Mass a a a a They are noble (inert) ases. They are nonetals. They have the sae theral conductivity. They have the sae nuber of protons. SZ30499 What characteristic is different in each isotope? the position in the periodic table of the eleents the net chare of the nucleus the ass of the protons in the nucleus the nuber of neutrons in the nucleus 15 This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education. SZ30673

8 G R E 30 L I F O R N I S T N R S T E S T Science Released Test Questions 33 Which class of eleents best conducts electricity? etals nonetals seietals noble (inert) ases SZ In a coparison of etals to nonetals, etals tend to have lower eltin points and reater conductivity than nonetals. barred alaxies. lower conductivity and lower density than nonetals. spiral alaxies. hiher density and lower eltin points than nonetals. irreular alaxies. syetrical alaxies. reater conductivity and hiher eltin points than nonetals. SZ The alaxies pictured above would best be classified as SZ student divides several cubes into two roups, based on whether or not each cube can float in water. What property is the student usin to classify the cubes? weiht density conductivity ass alaxy is best described as a cluster of hundreds of stars. thousands of stars. illions of stars. billions of stars. SZ SZ4035 To express the distance between the Milky Way alaxy and other alaxies, the ost appropriate unit of easureent is the eter. kiloeter. liht-year. astronoical unit. SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

9 LIFORNI STNRS TEST G R E Released Test Questions Science 36 Which of the followin sets contains only objects that shine as a result of reflected liht? oons, planets, and coets oons, coets, and stars planets, stars, and coets planets, stars, and oons SZ n object coposed ainly of ice is orbitin the Sun in an elliptical path. This object is ost likely a planet. an asteroid. a eteor. a coet. SZ opper (u) reacts with oxyen (O) to for copper oxide (uo). The properties of uo are ost likely different fro copper or oxyen. siilar to both copper and oxyen. siilar only to copper. siilar only to oxyen. SZ The followin equations represent cheical reactions. heical Reactions 1 2Na + 2H 2 O NaOH + H 2 2 H 2 + O 2 H 2 O 3 M + l 2 Ml 2 4 NaOH + Ml 2 Nal + MOH Which equation shows that the total ass durin a cheical reaction stays the sae? Which of the followin fors of enery is released or absorbed in ost cheical reactions? liht enery electrical enery sound enery heat enery 41 s a saple of water turns to ice, new olecules are fored. the ass of the saple is increased. SZ30150 SZ30457 the arraneent of the olecules chanes. enery is absorbed by the olecules. SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

10 G R E Science 42 The table below shows the ph and reaction to litus of four body fluids. ody Fluid ph red litus LIFORNI STNRS TEST blue litus lood 7.4 turns blue no chane ile.2 turns blue no chane Saliva 6. no chane turns red Gastric Juice 1.7 no chane turns red These data indicate that astric juice is very acidic. very basic. positively chared. neatively chared. Released Test Questions 44 Which of the followin eleents is best able to cobine with itself and hydroen (H) to for lare olecules? sodiu (Na) lithiu (Li) sulfur (S) carbon () SZ Which of the followin copounds is ost likely to be part of livin oraniss? H 6 12 O 6 F 3 Mol 2 si SZ What characteristic of carbon () akes it essential to livin oraniss? SZ30651 arbon fors crystal structures under certain conditions. arbon can exist as a solid, liquid, or as. arbon bonds in any ways with itself to for chains. arbon exists in radioactive fors. SZ This is a saple of alifornia Standards Test questions. This is NOT an operational test for. Test scores cannot be projected based on perforance on released test questions. opyriht 2009 alifornia epartent of Education.

Introduction - Grade 8 Science

LIFORNI STNRS TEST G R E Released Test Questions Science 8 Introduction - Grade 8 Science The following released test questions are taken from the Grade 8 Science Standards Test. This test is one of the