EVSSorting Materials into GroupsSorting materials – 2

Sorting materials – 2

Table of Contents

  • Classification based on Nature
  • Classification based on Solubility
  • Classification based on Sinking or Floating in Water
  • Summary
  • Did You Know?
  • What’s Next?

In the previous segment, we took a look at appearance – one of the parameters for sorting materials around us. In this segment of the chapter, ‘Sorting materials into groups’ let us look at how materials are sorted into groups on the basis of nature, solubility and ability of the object to sink or float in water.

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    How to classify materials based on nature?

    Hard materials

    Soft materials

    These materials cannot be compressed or scratched easily

    These materials can be compressed or scratched easily

    For example, Metals

    For example, Wax

    How to classify materials based on solubility?

    Soluble materials

    Insoluble materials

    These materials completely dissolve in water

    These substances do not mix with water and do not disappear even after stirring for a long time

    For example, Salt

    For example, Pebbles

    Classification based on Sinking or Floating in Water

    If the object doesn’t dissolve in water then there can be two outcomes: the object can either sink or float. Thus, this parameter is for substances that are insoluble.

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