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Natural sciences

The earth and beyond

Properties and uses of materials

Educator section

Memorandum

Complete the following table:

PROPERTIES SOLID LIQUID GAS
VOLUME It does not have a fixed volume – the volume changes easily. It spreads and occupies the available space.
FORM It takes the form of the container.
WEIGHT It has weight

Examples of phase changes:

  • Solid to liquid ice to water
  • Liquid to solid water to ice
  • Liquid to gas boiling water to water vapour
  • Gas to liquid water vapour / moisture condensing against glass, e.g. car windows or kitchen windows

Leaner section

Content

Activity: to classify materials [lo 2.2, lo 2.3]

  • Classification is when we divide substances with the same properties into groups.
  • Scientists classify different materials in different ways. The most well known way is the classification into solids, liquids and gases.

Complete the following table:

PROPERTIES SOLID LIQUID GAS
VOLUME Has a fixed volume. Has a fixed volume. ________________________________________________________
FORM Has a fixed form. ______________ ______________ ______________ Takes on the form of the container.
WEIGHT Has weight. Has weight. ______________

A substance can change from one state to another through heating or cooling:

Give an example of the following changes:

  • Solid to liquid:

_____________________________________________________________________

_____________________________________________________________________

  • Liquid to solid:

_____________________________________________________________________

_____________________________________________________________________

  • Liquid to gas:

_____________________________________________________________________

_____________________________________________________________________

  • Gas to liquid:

_____________________________________________________________________

_____________________________________________________________________

Assessment

Learning Outcome 2: Learners know, interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.2: We know this when the learner categorises information: categorises objects and organisms by two variables.

Assessment Standard 2.3: We know this when the learner interprets information: at the minimum, interprets information by using alternative forms of the same information.

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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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