Grouping things with similar properties together is called

• Variation

• Specification

• Nomenclature

• Classification

Materials that cannot be compressed easily are called __________

• Soft

• Rough

• Scaly

• Hard

purpose of sorting materials into groups is

• to study their property

• convenience

• both the above

what makes the basis of sorting materials into groups ?

• Similarities in their properties

• Differences in their properties

• Both the above

which is the hardest material among the following ?

• sponge

• iron

• rubber

• wood

which is the softest material among the following ?

• stone

• wood

• rubber

• sponge

Which object is made of glass?

• 
• 
• 
• 

Name a material that we get from plants?

• Plastic

• Metals

• Glass

• Wood