Chapter 6: Materials Around Us
Everything around us is made of materials. In this chapter we observe objects and their materials, group materials in different ways, test their properties with simple activities, and find out what matter is.
In this chapter you will
- identify the materials objects are made of
- group materials by their properties
- test hardness, shine, light, dissolving and floating
- explain what matter is
Topics
- Observing Objects Around Us NCERT 6.1
Objects are made of materials like wood, metal, plastic, glass, cloth and paper.
- Grouping Materials NCERT 6.2
Materials can be grouped by different properties; say which property you use.
- Properties of Materials NCERT 6.3
Properties include shine, hardness, how light passes (transparent, translucent, opaque), dissolving and floating.
- What is Matter? NCERT 6.4
Matter is anything that has mass and takes up space; it can be solid, liquid or gas.
Key words
- Material
- what an object is made of
- Property
- a feature of a material, like hardness or shine
- Lustrous
- shiny
- Transparent / translucent / opaque
- all light passes / some, blurry / none
- Soluble / insoluble
- dissolves in water / does not
- Matter
- anything that has mass and takes up space
Summary
- Objects are made of materials; one object can be made of different materials and one material can make many objects.
- Materials are grouped by properties such as shine, hardness, transparency, solubility and floating.
- We choose materials for a job because of their properties.
- Matter has mass and takes up space; it can be solid, liquid or gas.