Water absorbent and waterproof materials

Water has spilled on a table. Which object should be used to clean the spill?

• Plastic ruler and balloon

• Handkerchief and cotton towel

• Drinking glass and plastic spoon

• Glass bottle and rubber gloves

Which material absorbs water ?

• Metal

• Plastic

• Rubber

• Cotton

Which material does not absorb water ?

• Plastic

• Cotton

• Leather

• Wood

A lady wipes off sweat from her forehead by using a cotton towel. Why did she use a towel to wipe off the sweat ?

• The towel is made of plastic

• The towel is colourful

• The towel absorbs the sweat

• The towel is light

Water droplets fall on the surface of a certain material.What is this material ?

• Wood

• Metal

• Cotton

• Leather

A boy wears a raincoat. The raincoat is waterproof. What is a basic source for the raincoat's material?

• Basic source : Petroleum

  Material : Synthetic cloth

• Basic source :Rocks

  Material :Metal

• Basic source :Animal

  Material :Silk thread

• Basic source :Plants

  Material :Cotton

Tags

NGSS.MS-PS1-3

A roofer applies a silicon sealant to repair the cracks on the roof of a house. What property of the sealant will prevent water from seeping through the roof ?

• It releases air bubbles

• It is heavy

• It is water absorbent

• It is waterproof

Which group of objects are waterproof?

• Cotton towel, leather wallet, newspaper

• Balloon, plastic bottle, jam jar

• Handkerchief, tissue paper, leather belt

• Tissue paper, cotton socks, wool

A camping tent uses nylon cloth as its material. Why is nylon used as the material in the making of the tent ?

• It is light

• It reacts with water

• It is colourful

• It is waterproof

How do we know that an object has absorbed water ?

• The object dissolves

• The object changes shape

• The object becomes heavier

• The objects become lighter