1. Antara kumpulan berikut, yang manakah mempunyai kesemua objek boleh berkarat?

Which of the following groups consist of rusty objects?

Rajah menunjukkan sebuah basikal.

Diagram shows a bicycle.

2. Bahagian manakah akan berkarat jika terdedah kepada air dan udara?

Which parts will get rusty if they are exposed to the water and air?

Rajah menunjukkan satu penyiasatan mengenai pengaratan.

Diagram shows an investigation about rusting.

R - Paku besi akan berkarat

The iron nail will rust

S - Paku besi tidak akan berkarat

The iron nail not rust

T - Paku besi akan terapung di atas air

The iron nail will float on the water

U- Palm besi akan bertukar wama

The iron nail will change the colour

Antara berikut yang manakah akan berlaku selepas satu hari?

Which of the following occur after a day?

4. Paku di dalam bekas yang manakah paling cepat berkarat?

In which container the nails rust fastest?

5. Diagram shows an object.

Which of the following objects can be

grouped in the same group as the object

above?

6.Table shows the results of an investigation

by a group of Year 4 Bakti pupils.

What is the conclusion that can be made

from the results of this investigation?

What is the disease caused by rusting?

8. Which of the following objects will rust and

do not rust?

9.An experiment has been carried out by a group of pupils. The results of the

experiment are recorded in Table 2.

What can be concluded from this experiment?

10.What are the factors that cause rust?