Science Y5: Rusting

What is the color of rusting object?

• brownish red

• reddish brown

• greyish brown

• crimson red

Which material can rust?

• Plastic

• Paper

• Metal

• Iron

What is the disadvantage of rust?

• objects become shiny

• materials become brittle

• equipment become durable

• tools have different appearance

How to prevent this object from rusting?

• plating

• coating

• painting

• oiling

The factor for rusting is...

• presence of air and water

• presence of air and oil

• absence of air and water

• absence of oil and water

The rust on the tool will cause....

• heavier weight to lift door

• more force to open door

• number of locks increase

• pleasant sound when using door

Choose a correct statement

• Calcium chloride absorbs air

• Boiling water is absence of water

• Calcium chloride absorbs oil

• Boiling water is absence of air

Rusting can cause the tool to become..

• reddish

• dirty

• blunt

• greasy

Which method is suitable to prevent rusting on this item?

• painting

• greasing

• plating

• coating

Which material is suitable to plate this object?

• iron

• carbon

• gold

• copper