Question
How can materials be grouped together? In what ways do we classify materials?

Answer

Different materials have different properties. Materials with similar properties can be grouped together.
Different types of materials can be grouped based on any of the following properties:
  • Appearance.
  • Solubility.
  • Transparency.
  • Conductivity.
  • Combustibility—Easily burn or not.
  • Attraction towards magnet.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A student had a ball, a screen and a torch in working condition. He tried to form a shadow of the ball on the screen by placing them at different positions. Sometimes the shadow was not obtained. Explain.
Match the following items given in Column $A$ with that in Column $B$:
S.No.
Column $A$
S.No.
Column $B$
$(a)$
Handpicking
$(i)$
Conversion of water vapours into liquids.
$(b)$
Threshing
$(ii)$
Separating bran from flour.
$(c)$
Winnowing
$(iii)$
Separating larger size impurities.
$(d)$
Sieving
$(iv)$
Separating butter from milk.
$(e)$
Sedimentation
$(v)$
Conversion of water into Us vapours.
$(f)$
Evaporation
$(vi)$
Separating grains from its stalks.
$(g)$
Condensation
$(vii)$
Settling of heavier components at bottom.
$(h)$
Churning
$(viii)$
Separation by wind or by blowing air.
Match the following items given in Column $A$ with that in Column $B$:
S.No.
Column $A$
S.No.
Column $B$
$(a)$
Creeper
$(i)$
Absorption of mineral and water.
$(b)$
Herb
$(ii)$
Manufacture food.
$(c)$
Shrub
$(iii)$
Transport food, water and mineral.
$(d)$
Tree
$(iv)$
Reproduction.
$(e)$
Root
$(v)$
Need support to stand up.
$(f)$
Stem
$(vi)$
Hard and thick stem.
$(g)$
Leaf
$(vii)$
Green and tender stem.
$(h)$
Flower
$(viii)$
Hard but thin stem.
Read the function of parts of a plant given below:
  1. Fixes plant to the soil.
  2. Prepares starch.
  3. Takes part in reproduction.
  4. Supports branches and bears flowers.
In the diagram given in fig, write the names of the parts whose functions you have just read at the appropriate space.
Nature maintains a balance of carbon dioxide and oxygen in the atmosphere. Comment.
What are the reasons for which $SI$ system is recommended?
Write short notes on the following.
  1. Skull.
  2. Chest bones.
  3. Backbone.
  4. Hip bone.
  5. The shoulder bone.
  6. Limb bone.
Think of six activities which use electric current. Also name the devices used to perform the activity.
Example:
Activity you perform Device
Get light Torch
You are provided with a mixture of salt, sand, oil and water. Write the steps involved for the separation of salt, sand and oil from the mixture by giving an activity along with the diagram.
Select leaves showing reticulate venation and those showing parallel venation from the list given below and write them in the tabular form:
Peepal, neem, grass, mustard, methi, dhania (coriander), rose, tulsi, mango, sugarcane, maize, mint, wheat, rice.