Grade 8 Science - Complete

June Monthly Examination in Science 8- Life Science True Tr ue or False. Direction: Write T if the statement is TRUE and F if the statement is FLSE

 _____ 1. A hypothesis must be based on scientific knowledge.  _____ 2. A scientific theory is a guess about how or why something happens.  _____ 3. cientists make predictions that tell what will happen under any and all conditions.  _____ !. The scientific method includes the steps in"ol"ed in a scientific in"estigation. in"estigation.  _____ #. $%id life on &arth e"ol"e o"er time'( This )uestion can be answered scientifically. scientifically.  _____ *. &+periments are performed under controlled conditions.  _____ ,. cientists can study all aspects of the natural world- including e+perimenting on an e+tinct animal.  _____ . The dependent "ariable is always the opposite of the independent "ariable.  _____ /. 0ommunicating your results allows others to test your hypothesis. hypothesis.  _____ 1. &+perimental e"idence that agrees with your prediction supports your hypothesis.  _____ 11. A cell is the basic unit of the structure and function of all li"ing things  _____ 12. An adaptation is a characteristic characteristic that helps a li"ing thing sur"i"e and reproduce.  _____ 13. atural selection is a change in the characteristics of li"ing things o"er time.  _____ 1!. A population consists of many different species. species.  _____ 1#. 0harles %arwin de"eloped the theory of e"olution by natural selection.  _____ 1*. All li"ing li"ing things must maintain homeostasis.  _____ 1,. The characteristics of all li"ing things are controlled by genes.  _____ 1. The four unifying principles of biology are the cell theorytheory- the gene theory- homeostasis- and gra"ity.  _____ 1/. %eer sometimes eat the starlings birds4 that sit sit on them.  _____ 2. The cells of many different organisms organisms are "ery similar.

Multi!le "hoice. Direction:  5ead the )uestion carefully. W56T& W56T& the correct answer.

1

&+am &+ampl ples es of of biot biotic ic fac facto tors rs incl include ude A 7rass- flowers- and sunlight

0. 7rass- trees- soil- and water  

2

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8 7rass- trees- bees- and ants %. All of the abo"e 0ompo 0ompone nents nts of an an ecosy ecosyst stem em inc inclu lude de A oiloil- sun sunli ligh ghtt- wat water er-- and and wea weathe therr 0. All All the the bio bioti ticc and and abio abioti ticc fact factor orss in in an area area 8 7rass- trees- bees- and ants %. All of the abo"e Which Which descr describe ibess the poss possibl iblee flow flow of energ energy y in an ecosy ecosyste stem' m' A snakes snakes to to frogs frogs to to caterp caterpill illars ars to trees trees 8 trees trees to to frogs frogs to snake snakess to caterp caterpill illars ars 0 trees trees to to cater caterpil pillar larss to frogs frogs to to snake snakess % caterp caterpill illars ars to tree treess to frog frogss to snak snakes es The rela relatio tionsh nship ip betwe between en autot autotrop rophs hs and and produc producers ers is is A That autotr autotrophs ophs make make the the food food the produc producers ers eat. eat. 8 That produce producers rs make make the the food the the autotr autotrophs ophs eat. eat. 0 That That aut autot otro roph phss eat eat prod produc ucer ers. s. % That they are the same same orga organis nisms ms.. Which Which stat statemen ementt best best desc describ ribes es a trop trophic hic le"el' le"el' A A trophic trophic le"el le"el is the the feeding feeding position position of an organis organism m in a food chain chain or web. web. 8 A trophic trophic le"el le"el is the positi position on of an an organism organism in an ecosys ecosystem. tem. 0 A trophic trophic le"el le"el is the niche niche of an organism organism in an ecosys ecosystem. tem. % A trophic trophic le"el is the the feeding feeding role of an organism organism in an ecosyste ecosystem. m. &+am &+ampl ples es of decom decompos poser erss inc inclu lude de A Algae and cyanobacteria 0. 9ultures and raccoons 8 &arthworms- dung beetles- and spiders %. All of the abo"e Which Which organ organism ism would would usuall usually y be in the the fourt fourth h trophi trophicc le"el' le"el' A 5ats 0. 5abbits 8 :umans %. :awks

Whic Which h stat stateme ement nt best best def defin ines es ecol ecology ogy'' A The study study of how how li"ing li"ing things interact interact with with each each other. other. 8 The study study of how how li"ing li"ing things things interact interact with with each each other and with with their en"ironment. en"ironment. 0 The study study of how li"ing li"ing things things interact interact with with their their en"ironment en"ironment.. % The study study of how li"ing li"ing things things interact interact with with their their habitat. habitat. / Which Which state statemen mentt best best descri describes bes a bioge biogeoche ochemic mical al cycle cycle'' A A cycle that recycles recycles chemical chemical elements elements and and water. water. 8 A cycle that that continuou continuously sly cycles cycles chemica chemicall elements elements and water. water. 0 A cycle that that continuous continuously ly cycles cycles chemical chemical elements elements and water water that are needed needed by organisms. % A cycle cycle that continu continuously ously cycles cycles chemical chemical elements elements and and water that that are needed needed by organisms through an ecosystem. 1 An e+ampl e+amplee of an e+chan e+change ge pool pool is A The atmosphere for water 0. The &arth for carbon 8 The ocean for water %. All of the abo"e 11 The relationshi relationship p between condensation condensation and precipitatio precipitation n is that___________. that___________. A ;recipitati ;recipitation on needs needs to to occur occur prior to condens condensation. ation. 8 0ondens 0ondensati ation on needs needs to occur occur prior prior to to precipi precipitat tation ion.. 0 8oth 8oth are are par parts ts of of the the wate waterr cycl cycle. e. % 8oth 8oth b and and c descr describe ibe the relati relations onship hip.. 12 The best descriptio description n of the relationship relationship between between runoff and groundwat groundwater er is that A 5unoff 5unoff turns turns into into grou groundw ndwate ater. r. 8 7rou 7round ndwat water er tur turns ns int into o runof runoff. f. 0 8oth result result from precipitat precipitation ion and may end up in bodies of water. water. % one one of the abo" abo"ee 13 itrogen itrogen fi+ation fi+ation is____________ is_____________. _. A 6s the the process process of of changin changing g nitroge nitrogen n gas to nitra nitrates tes 8 6s the the proces processs of changi changing ng nitra nitrates tes to to nitrog nitrogen en gas 0 6s carr carried ied out out by nitrog nitrogen< ens blood