Soalam Amali Sains 3303

7/27/2019 Soalam Amali Sains 3303

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EXPERIMENTS

FOR

SCHOOL SCIENCE CURRICULUM

(HBSC3303_V2)

(20%)

SEMESTER MAY 2014

1



EXPERIMENT 1 SCIENCE PROCESS SKILL: PREDICTING

DISSOLVING SUGAR

Aim : To predict and investigate the relationship between the size of the sugar ith the time taken for the sugar to dissolve completely.

Theory: Making predictions is a process that uses extreme observations or data with scientific knowledge to predict events or relationships. It is shaping ideas about the expected outcome of what will happen based on present knowledge and understanding of observation and inference. A statement that is not based on previous observation or experience is not a prediction.

Solubility is the maximum quantity of solute that can dissolve in a certain quantity of solvent at a constant temperature to produce a saturated solution. Solubility is usually expressed in g/100ml.

Materials and apparatus:

1. Rock sugar/ gula batu 1. Granulated sugar / gula biasa 2. Caster sugar / gula kastor 3. Spoon to stir

4. 100ml beaker 5. Water 6. Stopwatch

Procedure:-

1. Use 3 types of sugar; granulated sugar, rock sugar and caster sugar in this experiment. 2. Predict which type of sugar will dissolve completely the fastest. 3. Measure 10g of sugar from each type of sugar and place separately into 3

different beaker.

4. Pour 100 ml of water into a beaker containing castor sugar and stir with a glass rod. 5. Record the time for the castor sugar to dissolve completely. 6. Repeat Steps 4 and 5 for granulated sugar and rock sugar. 7. Record all data in your laboratory report. 8. Plot a graph of the time period needed for each type of sugar to dissolve completely based on the results.

(5 marks)

2



EXPERIMENT 2 SCIENCE PROCESS SKILL: CONTROLLING VARIABLES PENDULUM 1

Aim: To investigate the effect of the length of the pendulum to the time it takes to create 10 complete swing

Materials and apparatus: 1. Thread 2. Retort stand 3. Weights 4. Ruler 5. Digital clock 6. Scissors 7. Protractor

Procedure:-

1. Provide weight of 40g. 2. Measure and cut the thread over 10cm using a ruler. 3. Tie the thread to the weight. 4. Release the pendulum from 40° angle and measure the time for ten complete oscillations using a stopwatch. Record in the table. 5. Repeat Steps 2 to 4 by using different thread lengths of 20cm, 30cm, and 40cm. 6. Plot a graph of the time for 10 complete oscillations against the length of the thread. 7. Record all data in your laboratory report.

(5 marks)

3



EXPERIMENT 3 SCIENCE PROCESS SKILL: CONTROLLING VARIABLES

PENDULUM II

Aim: To investigate the effect of the mass of the pendulum to the time frame of ten complete swing.

Materials and apparatus: 1. Thread 2. Retort stand 3. Weights 4. Ruler 5. Stopwatch

6. Scissors 7. Protractor

Procedure:-

1. Provide weight with mass of 20g. 2. Measure and cut the thread over 30cm using a ruler and tie to the weight. 3. Release the pendulum from 40° angle and measure the time for ten complete swings using the stopwatch. 4. Record the readings in the table.

5. Repeat Steps 1 to 4 by using different pendulum mass of 40g, 60g, 80g and 100g. 6. Plot a graph of the time for 10 complete oscillations versus the total mass of the weights based on the results. 7. Record all data in your laboratory reports.

(5 marks)

4



EXPERIMENT 4 SCIENCE PROCESS SKILL- USING SPACE-TIME RELATIONSHIP

MAKING THE SUN WATCH

Aim: To investigate the effects of time to the length of shadows.

Materials and apparatus: 1. Pencil 2. Manila paper 3. Clay 4. Ruler

Procedure: -

1. Measure the length of a pencil and put the pencil vertically at the center of manila paper using plasticine. 2. Tick the shadow of the pencil every hour until at least 8 readings. 3. Plot a graph that represents the length of the pencil shadow against time based on the results. 4. Record all data in your laboratory report.

(5 marks)

[Total: 20 marks]

5

Soalam Amali Sains 3303

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