2018 ST3 T4 - PROPERTIES OF MATERIALS (Material World)

1. identifies the observable properties of solids, liquids and gases, and that changes made to materials are reversible or irreversible
2. describes how the properties of materials determine their use for specific purposes.

have different observable properties and behave in different ways.

Students:

1. observe and compare the differences in the properties and behaviour of solids and liquids, eg shape and ability to flow
2. 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.

Students:

1. 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.
2. make and test predictions about the effect of temperature on the state of some substances,

eg adding and removing heat from water.

1. 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.
2. classify some observable changes that materials undergo as reversible or irreversible.

The properties of materials determine their use for specific purposes.

Students:

1. identify the properties of materials used in a familiar product and relate them to its use.
2. 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

1. describe how scientific and technological knowledge about the properties of materials can be used to inform decisions about use for their specific purposes
2. research the reasons for and the benefits of using solid, liquid and gaseous fuels for heating.