HARD
Earn 100

Make a list of 20 different manmade materials present in your home, school and places around and discuss.

Important Questions on Man Made Materials

MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
You must have come across the three 'R's to save the environment: Reduce, Recycle and Reuse. Explain Reduce in detail.
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials
The ability of a material to shine is called
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Which property does a jeweller consider while choosing a metal for jewellery?
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials
Mercury is a liquid metal.
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials
Which property is used to describe the shine of materials?
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Describe different textures of materials with examples.
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials
Wood has a dull appearance.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Name four substances which have lustre.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Any material that is lustrous is a metal.
HARD
Science>Chemistry>Man Made Materials>Introduction to man made materials
Write five properties on the basis of which materials can be classified.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Why do you think that classification of materials into groups is necessary? Name some properties according to which classification can be done.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Name three objects each that are lustrous and non-lustrous.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials

(i) Explain any two properties based on which materials are classified.

(ii) Based on what property of the material is a fabric chosen to make a raincoat?

MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
A nail file, a piece of emery paper, a vegetable grater, and a pumice stone all have a common property. Identify the property which is lost with their continuous usage.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
Name four substances which have no lustre.
MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
How do gold and rubber differ in their lustre?
HARD
Science>Chemistry>Man Made Materials>Introduction to man made materials
Arrange the following in the increasing order of hardness:
Cotton cloth, cotton boll, wax candle, iron nail, chalk piece, piece of wood.
 
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials
Define

(i) Malleability    (ii) Ductility

MEDIUM
Science>Chemistry>Man Made Materials>Introduction to man made materials
How will you find out the hardness or softness of a material?
EASY
Science>Chemistry>Man Made Materials>Introduction to man made materials

Give two examples of non-lustrous materials _____.