Selasa, 26 Mei 2009

paper 2 mid year sc form 1

SCIENCE PAPER 2

Part A (40 marks)

1. Draw lines ( lukis garisan) to match the symbols with the hazardous substances.

Concentrated acids

Alcohol

Radium

Sodium

Concentrated Alkali

( 5 marks)
2. The table below shows the results of the experiment. Calculate the period for one complete swing.

Length of the pendulum 10 20 30 40 50
Period for 10 complete swings 11.0 13.9 16.4 18.5 20.0
Period for one complete swings
(5 marks)
Based on the table, plot a bar chart of the period for one complete swing against the length of the pendulum. ( lukis geraf bar)


3. In an activity, a student collects some water from a burette in an empty beaker. Below is the information recorded by the student.

Based on the information given, answer the following questions.

i. What is the volume of water in the beaker? ___________ml

ii. What is the volume of one drop of water? _____________ml

iii Write your answer for ii in standard form. ________________ml ( 3 marks)


iv. Why is necessary (mengapa kah perlu) to measure 40 drops of water instead of just one drop?

______________________________________________________ ( 2 marks)


4. In a box below, draw a typical plant cell and an animal cell.(Lukis gambar sel tumbuhan dan gambar sel haiwan) . Label the diagram with


Nucleus cytoplasm cell membrane cell wall vacuole chloroplast

(Drawing 1 +1. label 6 marks) ( 8 marks)


5. a. What is meant by …
i. unicellular organism? _____________________________________________

ii. Give two examples of unicellular organism :

_____________and _______________

iii. Give two examples of multicellular organism:

___________and __________________

b. Define ( beri maksud) the term ‘ cell’:

_________________________________________________________

i. Give three examples of cell in our body. :

_____________, ______________ and ________________


( 9 matrks)


6. a. Draw the arrangement of particles in solid, liquid and gas.

solid liquid gas

b. Give two examples of liquid (beri 2 contoh cecair)

_______________

_______________
( 5 marks)

Part B ( 20 marks)

7. Study the diagram below, state the arrangement of particles in each of the object.

water
frog
flower
coffee
scissors
slippers

a. Arrangement of particles in: (Susunan zarah-zarah dalam:-)

Water : ____________________________________________________

Frog : ____________________________________________________

Flower : ___________________________________________________

Coffee : ___________________________________________________

Scissors : __________________________________________________

Slippers : ___________________________________________________

( 6 marks)

b. Group all the objects above into 2 groups according of their arrangement of particles.

( 4 marks)

8. A group of students carried out two experiments about diffusion of copper sulphate crystal, as shown in the diagram below. The observations of the experiments are made after a few days. ( Sekumpulan pelajar menjalankan dua eksperimen mengenai resapan zarah-zarah kuprum sifat seperti ditunjukan dalam rajah di bawah). Pemerhatian dilakukan selepas beberapa hari)

a. State variable that is

manipulated :_______________________________________________
constant : _______________________________________________
responding : _______________________________________________
(3 marks)
b. What can be observed after a few days?

Experiment 1: ____________________________________________________

Experiment 2 : ____________________________________________________
( 2 marks)

c. Give one inference for your answer.

________________________________________________________________( 1 mark)

d. In which experiment does diffusion take place faster?

________________________________________________________________( 1 mark)

e. Give reason for your answer in (d)

________________________________________________________________( 1 mark)

f. What is the conclusion of this experiment?

________________________________________________________________( 2 mark)

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