3.1 To classify materials

Natural sciences

The earth and beyond

Properties and uses of materials

Educator section

Memorandum

Complete the following table:

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:

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.