Biology Paper 3

BIOLOGY PAPER 3 QUESTION 1 QUESTION

MARKS

2 OBSERVATI ON 2 INFERENCE S

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VARIABLE AND METHOD TO HANDLED VARIABLED

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TO STUDY THE EFFECT OF ENVIRONMENTAL FACTOR( M/V) ON THE RATE OF TRANSPIRATION( RV) 1. At the M/V is _____ ,the R/V is _________ 2. At the M/V is _______ ,the R/V is _____ • Vice versa 1. At the M/V is _____ ,the R/V is _________ BECAUSE the R/V (based on the aim in question) is _______ 2. At the M/V is _____ ,the R/V is _________ Because the R/V (based on the ain in question ) is _____ Variables Manipulated :

Method to handled it Using different of M/V of ___,____,____ and ____ The R/V is recorded/calculated/measur ed/ by using stopwatch/thermometer/… …. Fixed variable is fixed at ______ throughout tthis experiment

Responding :

Fixed :

HYPOTHESI ES

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Tabulation data

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Plot the graph

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The higher the M/V, the higher the R/V The higher the M/V, the higher the R/V( aim in question)

Fixed

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M/V (unit)

R/V (unit)

• Has title • Has correctvalue and unit A (axis) : correct title with unit and uniform scale) P(plot) :transferred correctly S(shaped) :able to joint all point

RELATIONS HIP BASED ON THE GRAPH

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Question 2 Question

Marks

PROBLEM STATEMEN T

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TO DETERMINE THE URINE VOLUME RELEASED BY A STUDENT WHO DRINKS DIFFERENT VOLUME OF MINERAL WATER Has relationship between • M/V • R/V • Must have question mark ? SAMPLE ANSWER 1. How does the volume of water intake affect the volume of urine released? 2. Does volume of water intake affected the volume of urine released?

AIM

HYPOTHES IES

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To study the effect of M/V on the R/V . SAMPLE ANSWER: To study the effect of drinking different volumes of mineral water on urine output The higher/lower/increase/decrease the M/V , the higher/lower/…….. the R/V e.g. the higher the volume of water intake, the higher the volume of urine released.

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a) Manipulated: volume of water intake b) Responding :volume of urine released c) Fixed: same student Boy/girls, mineral, beakers, glass/cup,measuring c ylinder,stopwatch • Altleast 3 material and 3 apparatus • Do not separate between apparatus and material

VARIABLES

APPARATU S AND MATERIAL

TECHNIQU E

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PROCEDU RE

CONCLUSI ON

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To measure/record the ……………. By using measuring cylinder/stopwatch/thermometer To measure the volume of urine released after a fixed hour by using stopwatch K1 :steps to set up the apparatus K2: to handled fixed variable K3: to handled M/V K 4 : To handled R/V K5 : Precautionary step/how to get accurate reading e.g. use different dropper for each of experiment K1 A student is choosen and instructed to empty his bladderbefore start of experiment K3 Measure 200ml of water and put it into the mug K1 A student is given 200ml of mineral water to drink K1 A stopwatch is started immediately after consuming the water K2 During the experiment he is kept in any fixed suitable room within 2 hours K5 He is instructed not to eat or performed any vigorously physical activities K2 After half an hour stop watched

Must write hypothesis again