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NSW Syllabuses

Science K–10 - Stage 3 Material World


A student:

  • ST3-12MW

    identifies the observable properties of solids, liquids and gases, and that changes made to materials are reversible or irreversible

  • ST3-13MW

    describes how the properties of materials determine their use for specific purposes


  • Solids, liquids and gases have different observable properties and behave in different ways. (ACSSU077)
  • Students:
  • observe and compare the differences in the properties and behaviour of solids and liquids, eg shape and ability to flow
  • demonstrate that air has mass and takes up space, eg in an inflated basketball, bubbles, balloons and beaten egg white
  • Changes to materials can be reversible, such as melting, freezing, evaporating; or irreversible, such as burning and rusting. (ACSSU095)
  • Students:
  • observe and describe some readily observable reversible changes that materials can undergo, eg by melting and then solidifying chocolate, and dissolving and retrieving salt or sugar from water
  • make and test predictions about the effect of temperature on the state of some substances, eg adding and removing heat from water CCTN
  • observe some irreversible changes that common materials undergo to identify that the changes may result in new materials or products, eg rusting iron, burning paper, cooking a cake and making toffee
  • classify some observable changes that materials undergo as reversible or irreversible
  • The properties of materials determine their use for specific purposes.
  • Students:
  • identify the properties of materials used in a familiar product and relate them to its use
  • explore how materials are used in innovative ways for specific purposes, eg the use of soft-fall materials in playgrounds and geotextiles to retain water in landscaping
  • describe how scientific and technological knowledge about the properties of materials can be used to inform decisions about use for their specific purposes CCT
  • research the reasons for and the benefits of using solid, liquid and gaseous fuels for heating CCTSE