RUSTING YEAR 5

Objects that rust made of

• aluminium

• gold

• metal

• plastic

A layer of reddish brown on surface of a metal is called

• red paint

• red dirt

• rust

• brown rust

Choose an object that can rust

• razor blade

• straw

• dress

• aluminium pot

What are the factors that causes rusting

• presence of water and oil

• presence of water and carbon dioxide

• presence of boiled water and oxygen

• presence of water and oxygen

Rusting happens more faster when the humidity is high.

• True

• False

How do you prevent cycle chain from rusting?

• apply oil or grese

• painting

• plating iron with a layer of non rusty metals

• coating with plastic

How do you prevent this food can from rusting?

• painting

• apply oil or grease

• coating with plastic

• plating with non rusty metal

Which nails will rust after one week?

• A

• B

• C

• D

What is the function of the oil layer in test tube C?

• prevent the air from going out

• prevent air going inside

• absorbs the air in the water

• protect the nail from rusting

Does boiled water contain air?

• YES

• NO