section b thn5

8/11/2019 Section B THN5

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The obser(ations are re#orded in the following table.

Number of sparrows 2 * 6 +Number of grasshoppers ,0 *0 -0 20

a %tate the aim of in(estigation.

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b What is the trend of #hange in number of grasshoppers

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# redi#t the numbers of a grasshopper if the numbers of sparrows is 10.

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d What is the #on#lusion #an you ma e based on the obser(ations

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e %tate one other animal that #an be found at paddy field.

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-. The following table shows the numbers of orang utans found in a ungle.

Year 133+ 2000 2002 200* 2006

Number of orang utans 100 30 +0 40 a 5ased on the in(estigation" state the following that is $

i #hanged manipulated (ariable ///////////////////////////////////////////////////////

ii measured responding (ariable //////////////////////////////////////////////////////// iii ept the same fi7ed (ariable

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b redi#t the numbers of orang utan in 2006 /////////////////////////////////////////////////////////

# What is the trend in the number of orang utan in the table abo(e ////////////////////////////////////////////////////

*. 8igure below shows a food #hain.

FIGUREa 9sing the food #hain in 8igure" state two reasons why the number of

frogs de#reases

1. ///////////////////////////////////////////////////////

2. ///////////////////////////////////////////////////////


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b redi#t the number of sna es if the number of eagles in#reases in thefood #hain.

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# 9sing the food web abo(e" #onstru#t two food #hains.

1. //////////////////////////////////////////////////////////

2. //////////////////////////////////////////////////////////

5.

The results of the fair test are re#orded and shown in the table below.Distance between the ob ect

an! the torch"ight #cm$Si%e of sha!ow forme! on

the screen #cm$&'' ()' **' )(' &'+' &+

a What is the aim of the fair test.

To investigate the relationship between ____________________ and //////////////////////////// .

b What is the tren! of si'e of the shadow formed on the s#reen

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# 8rom the fair test" state the things need to bei #hanged $ //////////////////////////////////

ii measured $ //////////////////////////////////

tor#hlight

ob e#t

shadow

s#reen

,he !iagram below shows a fair test #arried out by a group of )ear 8i(epupils.


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iii ept the same $ //////////////////////////////////

d redi#t the si'e of shadow formed on the s#reen if the distan#e betweenthe ob e#t and the tor#hlight is 10#m.

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* A group of pupils #arried out an a#ti(ity using model #ars.The bar #hart below shows the information they ha(e obtained.

a What is the aim of the fair test

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b !n this fair test"

i What is #hanged

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ii What is obser(ed

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# What is the relationship between the number of dry #ells and the speed of

#ars!f the number of dry #ells ////////////////////// " the speed of #ars

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10

20

30

40

50

60

2 4 6 8 10 12

Number of dry #ell

%peed:m:s

section b thn5

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