Betmo Sains 2009

BENGKEL TEKNIK MENJAWAB SAINS SPM 2009

OLEH, PANITIA SAINS, SMK TUN FUAD STEPHENS. 05HB MEI 2009.

SCIENCE PASSING PERCENTAGE FROM 2002 – 2008 SMK TUN FUAD STEPHENS KIULU, TUARAN

Percentage of passes 100% 99.4%

99.3% 98.8% 97.3% 95.3%

95.0%

?

2002

2003

2004

2005

2006

2007

2008

2009

Format of Paper Science (1511):

Paper 1 Paper 2 Objective Subjective questions questions 50 multiple 3 sections (Section choice questions A, Section B and Section C) 1 hour 15 minutes 2 hours 30 minutes 50 marks 70 marks Questions are still bilingual

Paper 1 Use the same technique as you answered PMR Paper 1 Underline the keywords and try to understand the questions When choosing answer, cancel out the incorrect ones first Try to get at least 20 and above correct

(1) What is the source of pollution which causes eutrophication? A Vehicles B Factories C Plantations D Nuclear plants

(2) Sterilisation can be carried out by I autoclaves II antibiotics III gamma ray A B C D

I and II only I and III only II and III only I, II and III

(3) The figure shows a part of the carbon cycle Carbon dioxide in the atmosphere

P

R

Q Animals

Dead plants and animals

Animals

What are processes P, Q and R? P

Q

R

A

Photosynthesis

Decomposition

Respiration

B

Respiration

Photosynthesis

Decomposition

C

Respiration

Decomposition

Photosynthesis

D

Decomposition

Photosynthesis

Respiration

(4) Diagram below shows a model of an atom.

x

What is X? A. Electrons B. Protons C. Neutrons D. Nucleon

Paper 2 3 sections : Section A, Section B and Section C Read the questions thoroughly Underline keywords Give short and specific answers

Section A

20 marks Questions 1 – 4 Test your application of the science process skills (SPS): - Using space-time relationship data - Defining operationally variables - Making hypothesis Experimenting - Communicating - Classifying using numbers - Making inferences -

- Interpreting Controlling Observing Measuring and Predicting

Examples of questions : Determine the variables Making hypothesis and inferences Drawing graph Predict what will happen Do readings on apparatus such as thermometers, ammeters or tables Interpret the data given

A few tips for you : Identifying variables: (a) from the statement given (b) from the table (c) from the graph given When making hypothesis : state the relationship between the manipulated variable (MV) and responding variable (RV) Hypothesis : what will happen? Inference : why it happens like that?

A few tips for you : Identifying variables: (a) from the statement given (b) from the table (c) from the graph given Example: (a) Identifying variables from a statement. “Fig 1 shows an experiment to study the effect of impurities (mv) on the boiling point (rv) of distilled water. (SPM 2003)”

Identifying variables: (b) from the table Time/minute Masa/minit (MV)

0

2

4

6

8

10

12

Temperature/oC Suhu/ Oc (RV)

0

20

40

60

80

100

100

Substances (MV)

Boiling point /ºC (RV)

Distilled water

100

Distilled water + common salt

103

Identifying variables: (c) from the graph given

Vertical (RV)

Horizontal (MV)

Identifying variables: (c) Constant variable - Constant variables: - Found in the statement of the question. - NOT from the list Suggested of Common answers mistakes apparatus/materials. Parameter: 1. Hydrochloric acid

iii. Type of acid iv. Volume of acid v. Concentration of acid

2. Magnesium

i. Mass/weight of metal ii. Size of metal iii. Surface area of metal

Drawing graph: (a) from the statement given Example: i. Based on Table 1, draw a graph of temperature against time. (Berdasarkan Jadual 1, lukiskan graf suhu melawan masa). Type of graph? ii. Use the results from Table 1 to plot a bar chart showing the number of students against their blood group. (Berdasarkan keputusan dari Jadual 1, plotkan carta bar untuk menunjukkan bilangan pelajar melawan kumpulan darah). Type of graph?

Section B

30 marks Questions 5 – 9 Test your knowledge and understanding such as: - Specific (state facts, symbols, labeling) - Process and Methods (sequencing, classifying, methods) - Universal (understanding of concept, principle, law and theory) - Interpreting (generating information and ideas from graph, charts etc.) - Extrapolation (making prediction base on

A few tips for you :  The principle of marking is based on “wrong cancel right” Example: Where does meiosis occur in human? (Di manakah pembahagian sel secara meiosis berlaku dalam badan manusia) Sperm and skin (Sperma dan kulit) 

Answer as required by the question. Example: State TWO characteristics of the image by plane mirror. (Nyatakan DUA ciri imej yang dihasilkan oleh cermin satah) Upright, virtual, same size with object and inverted. (Tegak, maya, sama saiz dengan objek dan songsang.) 

Give short and specific answers. You don’t have to repeat the question. Example: State two factors that affect the growth of bacteria. (Nyatakan dua faktor yang mempengaruhi pertumbuhan bakteria?) Two factors that affect the growth of bacteria is temperature and pH. (Dua faktor yang mempengaruhi pertumbuhan bakteria ialah suhu dan pH.)  Temperature and pH (Suhu dan pH) 

Study the diagrams given. It might give you the answer. Example: The figuresperm shows how typessperm of twins are sperm formed. ovum zygote foetus

Twins A

  

ovum

ovum

zygotes

foetus

Twins B

How twins A are formed? (1M) How twins B are formed? (1M) State two similarities between twin A and twin B. (2M)

All drawings (graphs and figures need to be done using pencil). Make sure when drawing graphs, it fills more than 50% of the graph paper. Graph A

Graph B

Any calculations need to be shown. Don’t forget the unit. For labeling, the spelling need to be correct. WRONG Meisis Paml oil Neve Medula Cerebum

CORRECT Meiosis Palm oil Nerve Medulla Cerebrum

Section C

20 marks Questions 10 – 12 Question 10 compulsory. Choose between Question 11 or Question 12. Question 10 is experimenting. Question 11 and 12 are either conceptual or problem solving questions.

Question 10 Planning experiment (a) Suggest one suitable hypothesis based on the statement given (1M) (b) Describe experiment to investigate hypothesis based on: i. Aim of experiment (Tujuan eksperimen) [1M] ii. Identify the variables (Mengenalpasti pembolehubah) [2M] iii. Apparatus and materials (Senarai radas) [1M] iv. Procedure (Kaedah) [4M]

Question 10  Hypothesis : State relationship between manipulated and responding variable. (b) i. Aim of experiment : __________________________________ ii. Variables: Manipulated : __________________________________ Responding : __________________________________ Cosnstant : __________________________________ iii. Apparatus and materials : _____________________________ iv. Procedure : 1. ______________________ 2. ______________________ 3. ______________________

Question 10 (2) v. Presentation of data (Penjadualan data)

(Manipulated variable) (Responding variable)

Question 11 (Conceptual Question) Example: 11. (a) State 4 differences between mitosis and meiosis. (Nyatakan 4 perbezaan antara mitosis dengan meiosis.) [4M] (b) Diagram shows characteristics on human that show a type of variation. (Rajah menunjukkan Fingerpri Blood sifat-sifat pada manusia yang menunjukkan nt group Variatio sejenis variasi.) (Cap jari) Hair colour (Warna rambut)

n (Variasi)

(Kumpulan darah) Earlobe (Lekapan cuping telinga)

Question 11 (Conceptual Question)(2) • Build a concept based on the information in the diagram above. (Bina satu konsep berdasarkan maklumat dalam rajah di atas). Your answers must be based on the following criteria. (Jawapan anda hendaklah berdasarkan kriteria-kriteria berikut): • Identify two common characteristics (Kenal pasti dua ciri sepunya) [2M] • Develop initial concept (Membina konsep awal) [1M] • Give one example and one non-example in relation to the concept (Memberikan satu contoh lain dan satu bukan contoh yang berkaitan dengan konsep) [2M] • Explain the actual concept (Menjelaskan konsep sebenar)

[1M]

Question 11 (Conceptual Question) – Answer: 11. (a) State 4 differences between mitosis and meiosis. (Nyatakan 4 perbezaan antara mitosis dengan meiosis.) [4M]

- For similarities or differences it is better to answer usingMitosis a table: Meiosis

Question 11 (Conceptual Question) – Answer(2) 11. (b) For building concept you can use the following format. It is acceptable to do in point forms or numbering. • Two common characteristics: i. __________________________ ii. __________________________ • Initial concept : ___________________________ • Example : i. One example : ____________________ ii. One non-example : __________________ • Actual concept : ___________________________

Question 12 (Problem-solving Question) 12. (a) Water pollution is a main problem in our country. State the sources of water pollution and for it source, explain the effects on the environment. (Pencemaran air merupakan antara masalah utama di negara kita. Nyatakan punca-punca pencemaran air dan bagi setiap punca, huraikan kesannya terhadap alam sekitar.) [4M]

Question 12 (Problem-solving Question)(2) (b) Lately, there are a lot dead fishes in Klang River. This is all because of the water pollution in the riverSuggest ways that can be taken to overcome the water pollution. (Sejak akhir-akhir ini terdapat banyak ikan yang mati di Sungai Klang. Kesemuanya berpunca daripada pencemaran air di sungai tersebut. Cadangkan langkah-langkah yang boleh diambil untuk mengatasi pencemaran airnya.) Your explanation need to include : (Penerangan anda mestilah mempunyai:) - Problem statement (Pernyataan masalah) - Solving methods (Kaedah-kaedah penyelesaian).

Question 12 (Problem-solving Question) 12. (a) Water pollution is a main problem in our country. State the sources of water pollution and for it source, explain the effects on the environment. (Pencemaran air merupakan antara masalah utama di negara kita. Nyatakan punca-punca pencemaran air dan bagi setiap punca, huraikan kesannya terhadap alam sekitar.)

Punca Pencemaran

Kesan

Question 12 (Problem-solving Question)-Answer(2 (b) - Problem statement : ____________________ - Solving method : i. ____________________________ ii. _____________________________ iii. _____________________________

-THE END – Thank you for your attention. Wishing you all the best for SPM 2009