# spm perfect score biology 2010-answer-set-3

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PERFECT SCORE BIOLOGY 2010

BAHAGIAN SEKOLAH BERASRAMA PENUH DAN SEKOLAH KLUSTER KEMENTERIAN PELAJARAN MALAYSIA

PERFECT SCORE BIOLOGY

20102. Puan Tuan Norma binti Tuan Yaacob SMS Alam Shah 3. Encik Meli bin Hussin SMS Kuala Terengganu

MODULE Form 5Teachers CopyDISEDIAKAN OLEH: 1. Puan Hasimah binti Azit - Sekolah Seri Puteri, Cyberjaya

PAPER 3

1

PERFECT SCORE BIOLOGY 2010Question 1 Answer all questions. 1. A group of students carried out an experiment to study the effect of temperature to rate of plant transpiration. Diagram 1.1(a) shows a set-up apparatus used in this experiment. The apparatus are prepared and carry out in laboratory temperature of 30C. The whole were repeated Ai r bubbles placing the set-up apparatus in different temperatures.

Air bubbles

Diagram 1 (b) shows the position of the air bubble at the initial of the experiment.

2

PERFECT SCORE BIOLOGY 2010Table 1.1 shows the reading of temperature and location of air bubble in the tube of potometers after 5 minutes.

Thermometers

The location of air bubbles in tube (X) of potometer after 5 minutes

3

PERFECT SCORE BIOLOGY 2010Table 1.1(a) Complete the Table 1.1 by recording the temperature and the final position of air bubbles [3 marks] (b) (i) Based on table 1.1 state two observations on the relationship between the temperature and distance of air bubble travel in 5 minutes. 1. ..

2. ..

[3 marks] (ii) State the inferences which corresponds to the observations in 1 (a)(i) 1. ..

2. ..

[3 marks]

4

PERFECT SCORE BIOLOGY 2010(c) Base on this experiment, complete the Table 1.2 Variables Manipulated variable Method to handle the variable

Responding variable

Controls variable

[3 marks] Table 1.2 (d) State the hypothesis for this experiment.

[3 marks]

5

PERFECT SCORE BIOLOGY2010(e) The following list is part of the apparatus and material used in this experiment. Thermometer, stop watch, ruler, capillary tube, plant leaves, water Complete Table 1.3 by matching each variable with the apparatus and material used in this experiment. Variable Manipulated Apparatus material

Responding

Controlled Table 1.3 [3 marks]

(f) (i)

Base on the Table 1.1, construct the table and record the results of this experiment which includes following aspects: : Temperature (oC) The distance of air bubble moved (cm) Rate of transpiration (cm/minute) [3 marks]

6

PERFECT SCORE BIOLOGY 2010(ii) On the graph paper provided, draw a graph of rate of transpiration against the temperature. [3 marks]

7

PERFECT SCORE BIOLOGY 2010(iii) Based on the graph, state the relationship between the rate of transpiration and the temperature Explain your answer.

[3 marks] (g) Based on experiment, define operationally what the transpiration is.

[3 marks] (g) In another experiment, the apparatus is located under the bright sun shine. Predict the observation and explain your prediction.

[3 marks]

8

PERFECT SCORE BIOLOGY 2010Question 1 1(a) Score 3

Explanation Able to record three readings of temperature and the distance movement of air bubble in the potometer correctly. 20 oC = 4.5 cm + 0.5 30 oC = 5.0 cm + 0.5 40 oC = 9.0 cm+ 0.5

1(b) (i) Score 3

Explanation Able to state two correct observations based on experiment. Sample Answer:(either 2): 1. The air bubble moves from 0 cm to 4.5 cm at the temperature 20oC. 2 . The air bubble moves from 0 cm to 5.0 cm at the temperature 30oC. 3 . The air bubble moves from 0 cm to 9.0 cm at the temperature 40oC. 4. The air bubble moves under temperature 40oC is more than under temperature 30oC Explanation Able to state two reasonable inferences for the observation. Sample answer: 1. The water molecules evaporate from surface of the leaves /rate of transpiration is slow in cooler environment. 2. The water molecules evaporate from surface of the leaves rapidly /rate of the transpiration is high under warm environment.. 3. The water molecules evaporate faster in warmer condition compare to cooler condition.

1(b) (ii) Score 3

1(c) (i) Score

Explanation Able to state all the variables and the method to handle variable correctly () for each variable and method Variable Manipulated Variable Temperature Responding Variable The distance of air bubble / Rate of transpiration Controlled variable Humidity / Light intensity / number of leaves/ type of plant Method to handle The potometer is put under different temperature Measure and record the distance by using the ruler. Calculate rate of transpiration using formula: distance/time Experiment is carried out in the same room/ use same number of leaves that is 5 leaves / use same type of hibiscus plant in all experiment

3

9

PERFECT SCORE BIOLOGY 20101(d) Score 3 Explanation Able to state the hypothesis correctly based on the following criteria: P1 - State the temperature. P2 - State rate of transpiration / the distance of air bubble move R - State the relationship between P1 and P2. The higher the temperature the higher the rate of transpiration/ the further/longer the movement of air bubble. 1(e) Score 3 Variable Manipulated Responding Controls Apparatus Thermometer stop watch Ruler capillary tube Stop watch capillary tube Material plant leaves water Explanation Able to match the apparatus and material used to obtain data for the three variables correctly.

1(f)(i) Score 3

Explanation Able to construct a table and record the result of the experiment with the following criteria: C - Complete column and row with correct labels D - Transfer all data correctly. () T - Calculate the rate of transpiration (distance/minute) () Temperature (0C) 20 30 30 Distance of air bubble (cm) 4.5 5.0 9.0 Rate of transpiration (cm/min) 0.9 1.0 1.8

1(f)(ii) Score 3

Explanation Able to draw a graph of rate of transpiration against the temperature.. Axis (A) - both axis are labelled an uniform scales, independent variable on horizontal axis. () Point (P) - All points are correctly plotted. () Shape(S) - All points are connected smoothly ().

10

PERFECT SCORE BIOLOGY 20101(f)(iii) Score 3 Explanation Able to answer with the following aspects: the relationship between rate of transpiration and the temperature reason 1 - higher temperature, more water vapour evaporate from the leaf reason 2 - more water absorb by the plant from capillary. Explanation Able to state the definition of transpiration operationally, complete and correct, based on the following criteria. P1 - water vapour loss from the leaves P2 - causing the movement of air bubble in the capillary tube P3 - the factor that affect on transpiration. The transpiration is the loss of water vapour from the leaves causing the movement of air bubble in the capillary tube that affected by the temperature. 1(h) Score 3

1(g) Score 3

Explanation Able to predict correctly and explain the prediction based on the following item: P1 - the distance of air bubble. P2 - the transpiration rate P3 - higher temperature and higher light intensity. The distance of the air bubble is further/more than 9 cm because the transpiration rate is higher due to a higher temperature and higher light intensity.

11

PERFECT SCORE BIOLOGY 2010Question 2: An experiment is carried out by a group of student to study the effect of different concentrations of salt solution on the volume of urine produced. Three boys with same body weight and age are selected. They were not allowed to drink any water or taken any food in two hours before experiment and they were asked to empty their bladder before starting the experiment. The students were given three different types of solution to drink as shown in Table 1.1 Student A B C Type of solution 300 ml mineral water 300 ml of 5 % sodium chloride solution. 300 ml of 10% sodium chloride solution. Table 1.1 Urine samples of each student were taken after an hour is shown in Table 1.2 Student A B C

Volume of urine produced /ml

Table 1.2 12

PERFECT SCORE BIOLOGY 2010(a) (b) Record the volume of urine produced by each student in Table 12. [3 marks] (i) Based on Table 1.3 state two observations on the volume of urine produced. 1. ..

2. ..

[3 marks] (ii) State the inference which corresponds to the observations in 1 (a)(i) 1. ..

2. ..

(c)

Complete the Table 1.3 base on the experiment that was carried out.

[3 marks]

Variables Manipulated variable

Method to handle the variable

Responding variable

Controlled variable

Table 1.3

[3 marks]

13

PERFECT SCORE BIOLOGY 2010(d) State the hypothesis for this experiment.

[3 marks] (e) (i) Base on the Table 1.3, construct the table and record the results of this experiment which includes the following aspects: Concentration of sodium chloride solution. Volume of urine collected Water reabsorbed in kidney. [Water reabsorbed in the kidney = volume of solution intake - volume of urine collected]

14

PERFECT SCORE BIOLOGY 2010(ii) [3 marks] On the graph paper provided, draw the graph of water reabsorbed by kidneys against the concentration of sodium chloride solution. [3 marks]

15

PERFECT SCORE BIOLOGY 2010(iii) State the relationship between water reabsorbed by kidneys and the concentration of sodium chloride solution based on the graph in 1(e)(ii). Explain your answer.

[3 marks] (f) Based on this experiment, give operation definition of osmoregulation.

[3 marks] (g) In another experiment, student A was asked to drink 300 ml of water and sit in the air condition room for an hour. Predict the volume of urine he will

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