RUSTY OBJECTS AND FACTORS THAT CAUSE RUSTING

THURSDAY 14 OCTOBER 2021

SCIENCE 5 DLP

TIME : 08.30am – 10.00am

THEME : PHYSICAL SCIENCE

TOPIC : 7. RUSTING

CONTENT STANDARD : 7.1 Rusting Material.

LEARNING STANDARD :

7.1.2 Make generalisation that objects made from iron can rust.

7.1.3 Carry out experiments to determine the factors that cause rusting.

LEARNING OBJECTIVE:
At the end of this lesson, pupils are able to:

1. Make generalisation that objects made from iron can rust.

2. State the factors that cause rusting.

SUCCESS CRITERIA:
At the end of this lesson, pupils are able to:

1. Classifying the objects that can rust and cannot rust.

2. State the material used to make an object that can rust.

3. State the factors that cause rusting from the investigation.

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A. IDENTIFY OBJECTS THAT RUST.
ACTIVITY.

**To record the observations, list the objects that are used in your investigation.
**At the apparatus and materials above : List the objects that are used in your investigation.

2

OBSERVATIONS.
** List the objects that are used only.

Object Observation
Rusty / Not rusty
Needle

5. Construct a mind map using the data in the table.

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B. FACTORS THAT CAUSE RUSTING.

( Faktor-faktor yang menyebabkan pengaratan )

1. Objects made of iron will rust when exposed to WATER and AIR.
2. So, the factors that cause rusting of objects made of iron are:

i) Water
ii) Air
ACTIVITY.

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SCIENCE INFO
1. Anhydrous calcium chloride is used to absorb moisture so that the

condition inside the test tube is dry.
2. Boiled water does not contain any air.
3. Cooking oil is used to prevent air from entering the water.

In the investigation:
1) TEST TUBE A.
- Has air and water
2. TEST TUBE B.
- Has air and no water
3. TEST TUBE C.
- Has water and no air
4. TEST TUBE D.
- Has air and water

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Complete the table below and answer the question 8 ( interpreting the
data ) and question 9 ( conclusion).

7. DATA

Test tube Observation

A The iron wool ___________________.
B The iron wool ___________________.
C The iron wool ___________________.
D The iron wool ___________________.

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